Rework UI

[kaelonR]

The UI needs to be reworked. A Figma design has been made which is to be implemented.

• [x] Render main frame strata
• [x] Implement Header and close button
• [x] Add player rows with placeholder content to avoid resizing frame as party grows/shrinks
  • [x] Implement class icon and role icon
  • [x] Implement dungeon icon with keystone level
  • [x] Implement icon buttons with pagination
• [x] Add footer with version number, discord and github buttons