Merge pull request github#3354 from dbartol/dbartol/Recommendation

Recommend the CodeQL for VSCode extension

Author: jcreedcmu

.vscode/.gitattributes

@@ -0,0 +1 @@
+*.json  linguist-language=JSON-with-Comments

.vscode/extensions.json

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+{
+    // See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+    // Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+    // List of extensions which should be recommended for users of this workspace.
+    "recommendations": [
+        "github.vscode-codeql"
+    ],
+    // List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+    "unwantedRecommendations": []
+}