This commit introduces a more structured and visually appealing way to display version changes in the `ChangelogBottomSheet`.

Key changes:
- Created a new composable `VersionChanges` to encapsulate the display of a specific version's title and its changes.
- Introduced `VersionBadge`, a composable function that displays the version number in a circular badge with a primary container background.
- The `ChangelogBottomSheet` now uses `VersionChanges` to list out different beta builds (0.1.5-beta and 0.1.0-beta) with their respective descriptions.
- Removed the previous, simpler text display of version changes.
- Minor styling adjustments for padding, text alignment, and colors to improve readability.