.gitignore: Add CLion directories and VS build directory

.gitignore

@@ -9,6 +9,13 @@ CMakeUserPresets.json
 
 # Visual Studio work directory
 .vs/
+# Visual Studio build directory
+out/
 
 # Visual Studio Code
 .vscode/
+
+# CLion work directory
+.idea/
+# CLion build directories
+cmake-build-*/