feat: add accents option

[charlesrocket]

Adds dimmed symbols and moves bold behind the optional flag.

[codecov]

Codecov Report

Attention: Patch coverage is 44.44444% with 5 lines in your changes missing coverage. Please review.

Project coverage is 73.68%. Comparing base (44d882b) to head (7ee11c6).

Files with missing lines	Patch %	Lines
src/main.zig	44.44%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk      #11      +/-   ##
==========================================
- Coverage   75.80%   73.68%   -2.13%     
==========================================
  Files           1        1              
  Lines         186      190       +4     
==========================================
- Hits          141      140       -1     
- Misses         45       50       +5     

Files with missing lines	Coverage Δ
src/main.zig	73.68% <44.44%> (-2.13%)	⬇️

[charlesrocket]

Dimmed symbols look neat. Now all font modifications are behind optional flags.