Added a Contribute section to the website homepage

Removed site title from navbar and scaled down items slightly

Added Railyard app analytics (https://subwaybuildermodded.com/railyard/analytics)

Added Markdown Playground page (https://subwaybuildermodded.com/tools/md-playground)

Navbar dropdown improvements and optimizations

Moved Contribute page to the bottom of its navbar dropdown and added it to the appropriate footer section

Added View Analytics button to mods pages

Reversed the order of Data Quality and Level of Detail on the map analytics pages (to match Railyard Browse page and the Railyard app)

Fixed Return Home button on 404 page inheriting the wrong color scheme

Fixed trending graph current/previous split centering issue