build: Add linting and build scripts

[frankieyan]

This PR sets up:

• TypeScript
• Biome
• Husky + lint-staged for pre-commit hooks
• Npm scripts:
  • check — runs all check:* scripts in parallel (using npm-run-all2)
  • check:types — tsc --noEmit
  • check:biome — biome check
  • fix — runs all fix:* scripts in parallel
  • fix:biome — biome check --write
  • build — tsc
• GitHub Actions
  • pull_request.yml — Run check, build on PRs
  • check-semantic-pull-request.yml — Enforce conventional commit PR titles
    • Ubicloud runners need to be given access to this repo before we can use them: Add Ubicloud Managed Runners app #3

[doist-bot]

This pull request establishes a solid foundation for the project's development workflow by adding linting, build scripts, and CI. The changes are generally well-implemented, but there are a few critical issues in the GitHub Actions configuration that will cause the CI to fail. I've provided suggestions to fix the invalid action versions and to simplify the caching logic, aligning it with best practices.