Refactor dhcp options formatting impl

[Hequin0x]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 78.00000% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.33%. Comparing base (25fa5df) to head (2da3096).

Files with missing lines	Patch %	Lines
src/renderers/dhcp.rs	0.00%	8 Missing ⚠️
src/commands/generate.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #12      +/-   ##
==========================================
- Coverage   48.28%   47.33%   -0.96%     
==========================================
  Files          11       10       -1     
  Lines         321      319       -2     
==========================================
- Hits          155      151       -4     
- Misses        166      168       +2     

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