feat: handle package name for fonts

[TesteurManiak]

What does this change?

Fixes #357 🎯

Parse package_parameter_enabled for the fonts property and add a package accessor to the generated font class.

Example

class MyFonts {
  MyFonts._();

  static const String package = 'design_system';

  /// Font family: Arial Black
  static const String arialBlack = 'packages/$package/Arial Black';

  /// Font family: Calibri
  static const String calibri = 'packages/$package/Calibri';
}

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

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• Make sure to open a GitHub issue as a bug/feature request before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
  • Ensure the tests (melos run test)
  • Ensure the analyzer and formatter pass (melos run format to automatically apply formatting)
• Appropriate docs were updated (if necessary)

[AlexV525]

The changes look good at this point, but we need tests for it.

[TesteurManiak]

The changes look good at this point, but we need tests for it.

I've added a test case to fonts_gen_test.dart

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.62%. Comparing base (0f44829) to head (77007c9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #567      +/-   ##
==========================================
+ Coverage   97.55%   97.62%   +0.07%     
==========================================
  Files          24       24              
  Lines         860      886      +26     
==========================================
+ Hits          839      865      +26     
  Misses         21       21              

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[AlexV525]

Thanks for the new feature!