Add mcp.config.json for Playwright and MS docs configuration (#63607)

Adds `.vscode/mcp.json` to configure the playwright and docs MCP servers.

.vscode/mcp.json

@@ -0,0 +1,15 @@
+{
+  "servers": {
+    "playwright": {
+      "type": "stdio",
+      "command": "npx",
+      "args": [
+        "@playwright/mcp@latest"
+      ]
+    },
+    "microsoft.docs.mcp": {
+      "type": "http",
+      "url": "https://learn.microsoft.com/api/mcp"
+    }
+  }
+}