ci: configure or remove Partytown and add dev scripts + minimal CI

[xerion12]

• Decide on @astrojs/partytown: configure properly or remove unused.
• Add developer scripts: check, typecheck, format.
• Create GitHub Actions workflow for install, build, and checks.
• Document new scripts in README.

[Fluffy9]

The developer scripts you mentioned are not in the package.json

[HoomanDgtl]

hii @xerion0712 , your formatting check would fail in most of the cases as prettier convention is not being followed by the contributors actively:

• name: Check formatting
  run: npm run format

[xerion12]

thanks for calling this out. I’ve kept formatting visibility in CI but made it non-blocking so it won’t fail builds while still surfacing issues. I also added clear local scripts and can follow up with a pre commit hook to auto-format before commits if you prefer strict enforcement.”

• what I changed to fix:
  • package.json: added scripts
    • check: astro check
    • typecheck: tsc --noEmit
    • format: prettier --check .
    • format:write: prettier --write .
  • .github/workflows/ci.yml: made the formatting step non-blocking so it reports but doesn’t fail the job:
    • “Check formatting (non-blocking)” runs npm run format with continue-on-error: true

[xerion12]

if you prefer stricter enforcement, i can add Husky + lint staged in a followup so formatting is auto applied before commits and we can make CI strict again.