Add Features build file, update deployment target to 17.6, refactor s…

…creen navigation structure, and improve app icon retrieval logic.

Merge branch 'feature-browser'

Update deployment target to iOS 15.0, add conditional view for iOS 16.0.

- Adjusted deployment target to iOS 15.0 from 17.0
- Added conditional view for iOS 16.0 in DependenciesGraph+Body.swift

Add swift-syntax package, update macOS version to 11, and add logger …

…for features.

Refactor feature bodies to use shared implementation

- Update feature bodies to utilize a shared implementation for better code organization and consistency. Add logging for appearance and disappearance events.

Remove Features.xcworkspace/xcshareddata/swiftpm/ from .gitignore

- Stop ignoring Features.xcworkspace/xcshareddata/swiftpm/ in .gitignore.