Release SimForge 0.4.0

[knorbay]

What changed

• Upgraded the original prototype into the English-first SimForge circuit studio
• Added pin-aware circuit modeling, compatibility checks, safety validation, and Arduino-style sketch parsing
• Fixed a live-editor crash caused by overflowing numeric pin values
• Fixed false sketch detection from comments and string literals
• Added searchable components, improved canvas/inspector workflows, keyboard accessibility, and visual status feedback
• Added 21 core tests and removed tracked build artifacts
• Aligned the app, UI, documentation, CI artifacts, and macOS bundle at version 0.4.0
• Added repeatable signed macOS .app and ZIP packaging
• Added GitHub Actions builds for Windows x64, Linux x64, and macOS arm64

Validation

• dotnet build SimForge.sln -c Release --no-restore — passed
• dotnet test SimForge.sln -c Release --no-restore — 21/21 passed
• macOS arm64 .app code signature and bundle metadata verified
• Release ZIP preserves executable permissions and contains no AppleDouble entries