Improve Changelog Formatting and Structure

[fabianhug]

The recently introduced changelog feature needs improvement in its formatting and structure. Currently, the changelog is not properly formatted as a content list, and it's linking to individual log pages instead of displaying the content directly.

See this PR: #3

Current Behavior

• Changelog items are listed with links to separate pages
• The formatting of the changelog items is inconsistent
• The component structure may not be optimal for displaying changelog entries

Desired Behavior

• Changelog items should be displayed directly on the page without links
• Consistent and visually appealing formatting for all changelog entries
• Simplified component structure for easier maintenance and better performance

Proposed Changes

1. Modify the Changelog component to display content directly instead of linking to separate pages.
2. Implement a consistent formatting style for all changelog entries.
3. Restructure the component to simplify the rendering process.

Code References

• The main areas that need attention are in the changelog.tsx component and app/changelog folder
• Fumadocs MDX Docs: https://fumadocs.vercel.app/docs/mdx