chore: use bun to execute scripts

We cannot convert the scripts to TypeScript without needing an additional build step as the workflow used to publish the package to NPM still requires Node.js.

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
         # https://docs.npmjs.com/generating-provenance-statements
         run: |
           npm install --force
-          npm run build:lib
-          npm run package
+          node scripts
+          node scripts/npm-package
           cd package
           npm publish --provenance --access public

package.json

@@ -8,8 +8,8 @@
   "scripts": {
     "dev": "bunx --bun astro dev",
     "build": "bunx --bun astro build",
-    "build:lib": "node scripts",
-    "package": "node scripts/npm-package",
+    "build:lib": "bun scripts/index.js",
+    "package": "bun scripts/npm-package.js",
     "test": "bun test tests/*.ts",
     "test:e2e": "playwright test",
     "format": "prettier --write .",