feat: improve projection of flexible array members

[halildurmus]

Description

Related Issue

Fixes #399

Type of Change

• 🚀 feat – New feature (non-breaking change that adds functionality)
• 🛠️ fix – Bug fix (non-breaking change that fixes an issue)
• ❌ ! – Breaking change (fix or feature that causes existing functionality to change)
• ⚡ perf – Performance improvement
• 🧹 refactor – Code refactor (no functionality change)
• 📝 docs – Documentation update
• 🎨 style – Code style changes (formatting, renaming, etc.)
• 🧪 test – Test update or addition
• 🔧 build – Build related changes
• ✅ ci – CI related changes
• 🗑️ chore – Chore (maintenance, non-production code change)
• ◀️ revert – Revert a previous commit

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 62.21%. Comparing base (de03f0f) to head (33eb561).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/generator/lib/src/projection/field.dart	46.15%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #959      +/-   ##
==========================================
+ Coverage   61.64%   62.21%   +0.56%     
==========================================
  Files          35       36       +1     
  Lines        1176     1191      +15     
==========================================
+ Hits          725      741      +16     
+ Misses        451      450       -1     

Flag	Coverage Δ
generator	63.49% <46.15%> (+0.30%)	⬆️
win32	60.44% <100.00%> (+0.97%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/win32/lib/src/extensions/_internal.dart	100.00% <100.00%> (ø)
packages/generator/lib/src/projection/field.dart	53.33% <46.15%> (+8.88%)	⬆️