Add Git hooks setup for linting + formatting

If possible, a pre-commit hook will automatically apply eslint and
prettier fixes for the staged changes...

.nano-staged.mjs

@@ -0,0 +1,4 @@
+export default {
+  '*.{js,mjs}': 'eslint --fix',
+  '*.{html,js,json,md,mjs,yml}': 'prettier --write'
+}

.simple-git-hooks.json

@@ -0,0 +1,3 @@
+{
+  "pre-commit": "npx nano-staged"
+}

CONTRIBUTING.md

@@ -41,6 +41,12 @@ npm install -d
 
 More information on this issue can be found [here](https://github.com/puppeteer/puppeteer/issues/7740) and [here](https://broddin.be/2022/09/19/fixing-the-chromium-binary-is-not-available-for-arm64/).
 
+Optional: install Git hooks:
+
+```bash
+npx simple-git-hooks
+```
+
 To execute the build and tests run the following command in the root of the project:
 
 ```bash

package.json

@@ -60,12 +60,14 @@
     "grunt-contrib-watch": "^1.1.0",
     "grunt-exec": "^3.0.0",
     "gzip-js": "^0.3.2",
+    "nano-staged": "^0.8.0",
     "prettier": "^2.3.2",
     "qunit": "^2.19.4",
     "release-it": "^15.0.0",
     "rollup": "^3.17.2",
     "rollup-plugin-filesize": "^10.0.0",
-    "rollup-plugin-license": "^3.0.0"
+    "rollup-plugin-license": "^3.0.0",
+    "simple-git-hooks": "^2.8.1"
   },
   "engines": {
     "node": ">=16"