fix: migrate to winmd v4

[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)
• 🧹 refactor -- Code refactor
• ✅ ci -- Build configuration change
• 📝 docs -- Documentation
• 🧪 test -- Test
• 🗑️ chore -- Chore

[codecov]

Codecov Report

Merging #373 (2447671) into main (ab81af4) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #373      +/-   ##
==========================================
- Coverage   92.99%   92.99%   -0.01%     
==========================================
  Files          85       85              
  Lines        4125     4124       -1     
==========================================
- Hits         3836     3835       -1     
  Misses        289      289              

Files Changed	Coverage Δ
.../winrtgen/lib/src/models/winrt_metadata_store.dart	100.00% <100.00%> (ø)

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