Add configurable Ruff lint fixes and fix global line width

[apcamargo]

• Fix global lineWidth so valid values are preserved and oversized values clamp safely.
• Add opt-in fixLintErrors configuration to fix:
  • Unused imports
  • Import sorting
  • Required imports

This fixes issues #2 and #5

[apcamargo]

I'll merge the updates to main and resolve conflicts once the PR is reviewed. Ruff gets updated very frequently, so it's probably best to make sure the PR will be merged before I resolve any conflicts.