Add TabPagerX

[camosss]

• Project Name: TabPagerX
• Project URL: https://github.com/camosss/TabPagerX
• Project Description: Effortless SwiftUI tab pager with dynamic customization.
  TabPagerX offers flexible layouts, tab scroll preservation, customizable tab buttons and indicators, and swipe gesture navigation for seamless tab-based interfaces in SwiftUI.
• Why it should be added to awesome-swift: Provides a native SwiftUI alternative for tab paging with rich customization and active maintenance, filling a gap in SwiftUI UI components.
• At least 15 stars (GitHub project)
• Support Swift 5
• Updated contents.json instead of README
• Lib is fully open sourced, written in Swift and not a wrapper over compiled lib
• Description does not say "written in Swift" or variant 🤓