Update vscode settings

Recommend formatting and linting extension. Also, use 100 columns
for formatting.

.vscode/extensions.json

@@ -3,7 +3,9 @@
   // Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
   // List of extensions which should be recommended for users of this workspace.
   "recommendations": [
-    "eamodio.tsl-problem-matcher"
+    "eamodio.tsl-problem-matcher",
+    "dbaeumer.vscode-eslint",
+    "eternalphane.tsfmt-vscode"
   ],
   // List of extensions recommended by VS Code that should not be recommended for users of this workspace.
   "unwantedRecommendations": []

.vscode/settings.json

@@ -34,7 +34,7 @@
     "resolvePluginsRelativeTo": "./extensions/ql-vscode"
   },
   "editor.formatOnSave": false,
-  "prettier.singleQuote": true,
   "typescript.preferences.quoteStyle": "single",
-  "javascript.preferences.quoteStyle": "single"
+  "javascript.preferences.quoteStyle": "single",
+  "editor.wordWrapColumn": 100
 }