Add VSCode settings (#15885)

.vscode/extensions.json

@@ -0,0 +1,8 @@
+{
+  "recommendations": [
+    "esbenp.prettier-vscode",
+    "editorconfig.editorconfig",
+    "dbaeumer.vscode-eslint",
+    "streetsidesoftware.code-spell-checker"
+  ]
+}

.vscode/settings.example.json

@@ -0,0 +1,15 @@
+{
+  "[javascript]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode",
+    "editor.formatOnSave": true,
+    "editor.codeActionsOnSave": ["source.fixAll.eslint"]
+  },
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": "explicit"
+  },
+  "prettier.requireConfig": true,
+  "eslint.experimental.useFlatConfig": true,
+  "files.exclude": {
+    "dist*": true
+  }
+}