Add very simple language extension for VS code

vscode-extension/.gitattributes

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+# Set default behavior to automatically normalize line endings.
+* text=auto
+

vscode-extension/.gitignore

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+node_modules
+*.vsix

vscode-extension/.vscode/launch.json

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+// A launch configuration that launches the extension inside a new window
+// Use IntelliSense to learn about possible attributes.
+// Hover to view descriptions of existing attributes.
+// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+{
+	"version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Extension",
+            "type": "extensionHost",
+            "request": "launch",
+            "args": [
+                "--extensionDevelopmentPath=${workspaceFolder}"
+            ]
+        }
+    ]
+}

vscode-extension/.vscodeignore

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+.vscode/**
+.vscode-test/**
+.gitignore
+vsc-extension-quickstart.md

vscode-extension/CHANGELOG.md

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+# Change Log
+
+All notable changes to the "insect" extension will be documented in this file.
+
+Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
+
+## [Unreleased]
+
+- Initial release

vscode-extension/README.md

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+# insect README
+
+This is the README for your extension "insect". After writing up a brief description, we recommend including the following sections.
+
+## Features
+
+Describe specific features of your extension including screenshots of your extension in action. Image paths are relative to this README file.
+
+For example if there is an image subfolder under your extension project workspace:
+
+\!\[feature X\]\(images/feature-x.png\)
+
+> Tip: Many popular extensions utilize animations. This is an excellent way to show off your extension! We recommend short, focused animations that are easy to follow.
+
+## Requirements
+
+If you have any requirements or dependencies, add a section describing those and how to install and configure them.
+
+## Extension Settings
+
+Include if your extension adds any VS Code settings through the `contributes.configuration` extension point.
+
+For example:
+
+This extension contributes the following settings:
+
+* `myExtension.enable`: enable/disable this extension
+* `myExtension.thing`: set to `blah` to do something
+
+## Known Issues
+
+Calling out known issues can help limit users opening duplicate issues against your extension.
+
+## Release Notes
+
+Users appreciate release notes as you update your extension.
+
+### 1.0.0
+
+Initial release of ...
+
+### 1.0.1
+
+Fixed issue #.
+
+### 1.1.0
+
+Added features X, Y, and Z.
+
+-----------------------------------------------------------------------------------------------------------
+
+## Working with Markdown
+
+**Note:** You can author your README using Visual Studio Code.  Here are some useful editor keyboard shortcuts:
+
+* Split the editor (`Cmd+\` on macOS or `Ctrl+\` on Windows and Linux)
+* Toggle preview (`Shift+CMD+V` on macOS or `Shift+Ctrl+V` on Windows and Linux)
+* Press `Ctrl+Space` (Windows, Linux) or `Cmd+Space` (macOS) to see a list of Markdown snippets
+
+### For more information
+
+* [Visual Studio Code's Markdown Support](http://code.visualstudio.com/docs/languages/markdown)
+* [Markdown Syntax Reference](https://help.github.com/articles/markdown-basics/)
+
+**Enjoy!**

vscode-extension/language-configuration.json

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+{
+    "comments": {
+        // symbol used for single line comment. Remove this entry if your language does not support line comments
+        "lineComment": "#",
+        // symbols used for start and end a block comment. Remove this entry if your language does not support block comments
+        //"blockComment": [ "/*", "*/" ]
+    },
+    // symbols used as brackets
+    "brackets": [
+        ["(", ")"]
+    ],
+    // symbols that are auto closed when typing
+    "autoClosingPairs": [
+        ["(", ")"],
+    ],
+    // symbols that can be used to surround a selection
+    "surroundingPairs": [
+        ["(", ")"],
+    ]
+}

vscode-extension/package.json

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+{
+    "name": "insect",
+    "displayName": "Insect",
+    "description": "Syntax highlighting for the Insect programming language",
+    "version": "0.0.1",
+    "engines": {
+        "vscode": "^1.71.0"
+    },
+    "categories": [
+        "Programming Languages"
+    ],
+    "contributes": {
+        "languages": [{
+            "id": "insect",
+            "aliases": ["Insect", "insect"],
+            "extensions": [".ins"],
+            "configuration": "./language-configuration.json"
+        }],
+        "grammars": [{
+            "language": "insect",
+            "scopeName": "source.insect",
+            "path": "./syntaxes/insect.tmLanguage.json"
+        }]
+    }
+}

vscode-extension/syntaxes/insect.tmLanguage.json

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+{
+	"$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
+	"name": "Insect",
+	"patterns": [
+		{
+			"include": "#keywords"
+		},
+		{
+			"include": "#comments"
+		},
+		{
+			"include": "#numbers"
+		},
+		{
+			"include": "#dimension"
+		},
+		{
+			"include": "#identifier"
+		}
+	],
+	"repository": {
+		"keywords": {
+			"patterns": [
+				{
+					"name": "keyword.control.insect",
+					"match": "\\b(dimension|unit|let)\\b"
+				}
+			]
+		},
+		"numbers": {
+			"patterns": [
+				{
+					"name": "constant.numeric",
+					"match": "\\b[0-9]+(\\.[0-9]+)?\\b"
+				}
+			]
+		},
+		"comments": {
+			"patterns": [
+				{
+					"name": "comment.line.number-sign",
+					"match": "#.*$"
+				}
+			]
+		},
+		"dimension": {
+			"patterns": [
+				{
+					"name": "entity.name.type",
+					"match": "\\b[A-Z][A-Za-z]+\\b"
+				}
+			]
+		},
+		"identifier": {
+			"patterns": [
+				{
+					"name": "variable.name",
+					"match": "\\b\\p{Ll}+\\b"
+				}
+			]
+		}
+	},
+	"scopeName": "source.insect"
+}

vscode-extension/vsc-extension-quickstart.md

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+# Welcome to your VS Code Extension
+
+## What's in the folder
+
+* This folder contains all of the files necessary for your extension.
+* `package.json` - this is the manifest file in which you declare your language support and define the location of the grammar file that has been copied into your extension.
+* `syntaxes/insect.tmLanguage.json` - this is the Text mate grammar file that is used for tokenization.
+* `language-configuration.json` - this is the language configuration, defining the tokens that are used for comments and brackets.
+
+## Get up and running straight away
+
+* Make sure the language configuration settings in `language-configuration.json` are accurate.
+* Press `F5` to open a new window with your extension loaded.
+* Create a new file with a file name suffix matching your language.
+* Verify that syntax highlighting works and that the language configuration settings are working.
+
+## Make changes
+
+* You can relaunch the extension from the debug toolbar after making changes to the files listed above.
+* You can also reload (`Ctrl+R` or `Cmd+R` on Mac) the VS Code window with your extension to load your changes.
+
+## Add more language features
+
+* To add features such as intellisense, hovers and validators check out the VS Code extenders documentation at https://code.visualstudio.com/docs
+
+## Install your extension
+
+* To start using your extension with Visual Studio Code copy it into the `<user home>/.vscode/extensions` folder and restart Code.
+* To share your extension with the world, read on https://code.visualstudio.com/docs about publishing an extension.