feat: qr and publicURL options and --qr, --no-qr, and --public-url cli flags

[pi0]

• refactor: better watcher warning message
• refactor: fix option types and handling
• feat: top level qr and publicURL options and cli flags

🔗 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

📝 Checklist

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

[codecov]

Codecov Report

Merging #97 (a2aba1b) into main (ad82a70) will increase coverage by 0.22%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
+ Coverage   51.47%   51.70%   +0.22%     
==========================================
  Files          10       10              
  Lines        1490     1497       +7     
  Branches      111      111              
==========================================
+ Hits          767      774       +7     
  Misses        723      723              

Files Changed	Coverage Δ
src/listen.ts	92.71% <100.00%> (+0.10%)	⬆️
src/types.ts	100.00% <100.00%> (ø)