feat: improve watcher experience

[pi0]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR uses @parcel/watcher to watch all app directory (dirname(entry)) for changes. We could alternatively use to watch dependency graph of entry but it could be unstable and not possible currently since jiti is not exposing the cache.

Error handling and better resolve ordering with time measurement also added.

(/cc @Atinux some nostalgia here haha)

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #82 (19ed49a) into main (cd9f66a) will decrease coverage by 6.91%.
Report is 1 commits behind head on main.
The diff coverage is 2.97%.

@@            Coverage Diff             @@
##             main      #82      +/-   ##
==========================================
- Coverage   52.84%   45.93%   -6.91%     
==========================================
  Files           7        7              
  Lines         933     1082     +149     
  Branches       55       55              
==========================================
+ Hits          493      497       +4     
- Misses        440      585     +145     

Files Changed	Coverage Δ
src/watch.ts	4.91% <1.88%> (-11.75%)	⬇️
src/_utils.ts	71.28% <12.50%> (-4.25%)	⬇️
src/types.ts	100.00% <100.00%> (ø)