feat: improves feed highlights carousel performance

[rfcbf]

Description

Optimizes the feed highlights carousel for better performance by reducing shadow complexity and utilizing drawing groups.

Introduces a vertical carousel layout for landscape mode, providing an alternative display of highlights alongside the main feed.

Enhances accessibility and provides a more refined user experience through adjusted card layouts and auto-scroll improvements.

Type of Change

• 🎉 feat: New feature
• 🐛 fix: Bug fix
• 📝 docs: Documentation update
• 💄 style: Code style/formatting changes
• ♻️ refactor: Code refactoring
• ⚡ perf: Performance improvement
• ✅ test: Adding or updating tests
• 🔧 chore: Maintenance tasks
• 🏗️ build: Build system changes
• 👷 ci: CI configuration changes

Related Issue

Screenshots/Videos

Testing

• Tested on iPhone (specify model/iOS version):
• Tested on iPad (specify model/iOS version):
• All unit tests pass
• No SwiftLint warnings/errors

Checklist

• My code follows the project's code style
• I have performed a self-review of my code
• I have commented my code where necessary
• I have updated the documentation (if applicable)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• My branch is up-to-date with the base branch

Additional Notes