Builds and hashes the CSS and JS assets for the AttachedDashboard.
mix attached_dashboard.build_assetsSteps:
- Runs Tailwind CSS (v4) to compile
assets/css/app.css. - Runs esbuild to bundle
assets/js/app.js. - MD5-hashes the output files and renames them to
app-<md5>.css/app-<md5>.js. - Writes
priv/static/manifest.json.