feat: Add support for OCaml nested comments

[ianlewis]

Description:

Add support for OCaml nested comments.

Related Issues:

Fixes #1628

Checklist:

• Review the CONTRIBUTING.md documentation.
• Add a reference to a related issue in the repository.
• Add a description of the changes proposed in the pull request.
• Add unit tests if applicable.
• Update documentation if applicable.
• Add a note in the CHANGELOG.md if applicable.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 76.41%. Comparing base (1a53105) to head (cb551fa).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/scanner/scanner.go	75.00%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1630      +/-   ##
==========================================
- Coverage   76.55%   76.41%   -0.15%     
==========================================
  Files          19       19              
  Lines        1203     1221      +18     
==========================================
+ Hits          921      933      +12     
- Misses        205      209       +4     
- Partials       77       79       +2     

Files with missing lines	Coverage Δ
internal/scanner/languages.go	100.00% <ø> (ø)
internal/scanner/scanner.go	71.42% <75.00%> (-0.26%)	⬇️