feat: Game Link Improvements

[cjs8487]

Improves the experience of working with and utilizing the links for games for both game owners and players, and fixes some consistency issues with when and where links would be shown.

Changes

• Links are now a standalone data model element, bringing it in line with the form component and removing the parsing component from the forms and display areas.
  • A migration script is included that uses the current regex logic and enforces the new, corrected data requirements (which are also now enforced by the database)
  • This allows the individual portions of links to be used discretely without having to individually parse them out of the markdown with regex
• Links are no longer displayed on the overview page
• Descriptions of links are now shown as tooltips over the link
• Links can now be copied to clipboard with a dedicated button

Fixes

• Fixed a design oversight that made links largely unreadable under some conditions in the sidebar
• Fixed a styling issue where having too many links could cause an infinitely growing chasm to occur between the game page and the footer
• Fixed a bug that caused the links section of the game sidebar to render even when there were no links to show
• Fixed a bug that allowed links without names, or without urls, to be added to games.