chore: add engineering improvements

- Configure Prettier with unified code style rules
- Add husky + lint-staged for automated pre-commit checks
- Add commitlint to enforce conventional commit messages
- Add PR check workflow for CI automation
- Auto-format all files with Prettier
- Fix TypeScript any types in field-crypto.ts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.prettierignore

@@ -1,3 +1,23 @@
 # Ignore artifacts:
 build
 coverage
+dist
+dist-ssr
+release
+
+# Dependencies
+node_modules
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+
+# Database
+db
+
+# Environment
+.env
+
+# Misc
+*.min.js
+*.min.css
+openapi.json