build: Enable lint-staged

This commit introduces `lint-staged` to automate code formatting before
committing changes.

Previously, the `.husky/pre-commit` hook relied on
`npm run prettier:check`, which only performed a check for code style
violations but did not automatically fix them.  This meant that
developers had to manually run `prettier` to format their code before
committing.

Most notably, using Husky to achieve this automatically formats only the
files that are to be committed, saving developers bot time and sanity.

The changes implement the following:

- **Update `.husky/pre-commit`:** The hook is now configured to run
`npm run pre-commit` which executes `lint-staged`  to automatically
format code changes.
- **Add `pre-commit` script to `package.json`:**  This script runs
`lint-staged` with the `--concurrent false` flag, ensuring that
formatting happens sequentially for improved compatibility with eslint
and reliability.
- **Modify `lint-staged` configuration in `package.json`:**  The
configuration now targets specific file types
(`*.{css,html,js,json,md,twig,yml}`) for formatting. This clarifies the
scope of automatic formatting.

This change simplifies the development workflow by automating the code
formatting process, ensuring all commits adhere to the project's style
guidelines without manual intervention. This improves code consistency
and reduces the possibility of style-related issues in the codebase.

.husky/pre-commit

@@ -1 +1 @@
-npm run prettier:check
+npm run pre-commit

package.json

@@ -35,6 +35,7 @@
     "dist-win": "electron-builder -w",
     "dist-mac": "electron-builder -m",
     "dist-linux": "electron-builder -l",
+    "pre-commit": "lint-staged --concurrent false",
     "prettier:check": "prettier --check \"**/*.{css,js,json,md,twig,yml}\"",
     "prettier:format": "prettier --write \"**/*.{css,js,json,md,twig,yml}\"",
     "postdist": "npm run pack-win && npm run pack-mac",
@@ -44,7 +45,7 @@
     "prepare": "husky"
   },
   "lint-staged": {
-    "{**/*,*}.{css,js,json,md,twig,yml}": "prettier --write"
+    "*.{css,html,js,json,md,twig,yml}": "prettier --write"
   },
   "build": {
     "appId": "com.sidenoder.app",