Move vscode settings to the frontend folder

Since it applies to all of frontend, I think it makes more sense to have it here instead of src

(cherry picked from commit e12c679cd8961ec9d2ef744761303831b81e64fb)

frontend/.vscode/settings.json

@@ -0,0 +1,23 @@
+// Place your settings in this file to overwrite default and user settings.
+{
+  "files.insertFinalNewline": true,
+
+  "files.exclude": {
+    "**/node_modules": true,
+    "**/*.d.css": true
+  },
+
+  "editor.formatOnSave": false,
+  "editor.codeActionsOnSave": {
+    "source.fixAll": true
+  },
+
+  "typescript.preferences.quoteStyle": "single",
+
+  "eslint.validate": [
+    "javascript",
+    "javascriptreact",
+    "typescript",
+    "typescriptreact"
+  ],
+}