Disable Prettier if no prettier config exists (#3994)

A lot of users of [prettier extension](https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode) use it to format files automatically on save leading to unwanted diffs, so I've added an option to disable prettier unless there is a prettier config file.

Co-authored-by: Joey Robichaud <[email protected]>

Author: muhammadsammy

.vscode/settings.json

@@ -1,6 +1,7 @@
 {
     "editor.tabSize": 4,
     "editor.insertSpaces": true,
+    "prettier.requireConfig": true,
 
     "files.exclude": {
         "out": true,
@@ -20,4 +21,4 @@
     "typescript.tsdk": "./node_modules/typescript/lib",
     "mocha.enabled": true,
     "omnisharp.autoStart": false
-}
+}