refactor: refactor `winrtgen` pkg

[halildurmus]

Description

Related Issue

Type of Change

• [ ] ✨ feat -- New feature (non-breaking change which adds functionality)
• [ ] 🛠️ fix -- Bug fix (non-breaking change which fixes an issue)
• [ ] ❌ ! -- Breaking change (fix or feature that would cause existing functionality to change)
• [x] 🧹 refactor -- Code refactor
• [ ] ✅ ci -- Build configuration change
• [ ] 📝 docs -- Documentation
• [ ] 🧪 test -- Test
• [ ] 🗑️ chore -- Chore

[codecov[bot]]

Codecov Report

Merging #368 (ac18a0a) into main (98c3add) will decrease coverage by 0.03%. The diff coverage is 95.09%.

:exclamation: Current head ac18a0a differs from pull request most recent head d107257. Consider uploading reports for the commit d107257 to get more accurate results

@@            Coverage Diff             @@
##             main     #368      +/-   ##
==========================================
- Coverage   92.88%   92.86%   -0.03%     
==========================================
  Files          85       85              
  Lines        4104     4104              
==========================================
- Hits         3812     3811       -1     
- Misses        292      293       +1     

Files Changed	Coverage Δ
...ackages/winrtgen/lib/src/extensions/base_type.dart	100.00% <ø> (ø)
...es/winrtgen/lib/src/models/namespace_analyzer.dart	100.00% <ø> (ø)
.../winrtgen/lib/src/models/winrt_metadata_store.dart	100.00% <ø> (ø)
...inrtgen/lib/src/projections/method_forwarders.dart	77.70% <0.00%> (-0.53%)	:arrow_down:
...ages/winrtgen/lib/src/projections/types/array.dart	98.94% <ø> (ø)
...kages/winrtgen/lib/src/models/projection_kind.dart	94.11% <97.05%> (+0.63%)	:arrow_up:
...en/lib/src/extensions/custom_attributes_mixin.dart	100.00% <100.00%> (ø)
packages/winrtgen/lib/src/extensions/method.dart	100.00% <100.00%> (ø)
...ackages/winrtgen/lib/src/extensions/parameter.dart	100.00% <100.00%> (ø)
packages/winrtgen/lib/src/extensions/string.dart	100.00% <100.00%> (ø)
... and 14 more

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