chore: update lint-staged config

Use `lint-staged.config.cjs` instead of `.lint-stagedrc.json`.

Since lint-staged will only run tools for matching targets so the
command line options to deal with empty targets are never needed.

Run `prettier --write` for all files that Prettier can autofix. These
fixes are added to the same commit instead of resulting in a new commit.

lint-staged.config.cjs

@@ -0,0 +1,7 @@
+module.exports = {
+  '*': 'prettier --write',
+  'package.json': 'npmPkgJsonLint',
+  '*.md': ['markdownlint'],
+  '*.{js,cjs,mjs,json,jsx,mdx,ts,tsx}': ['eslint'],
+  '*.{css,scss}': ['stylelint'],
+};