Add comprehensive documentation for the command zone feature.
Developer documentation:
- command_zone_architecture.md: detailed architecture overview
- Layer separation (types, state, logic, graphics)
- Component interactions and dependencies
- Testing strategy and coverage
- Index update to include new architecture doc
User documentation:
- commander_format.md: how to use Commander format in Cockatrice
- Zone configuration options
- Gameplay mechanics (commander tax, zone reveals)
- Tips for Commander games
- Index update to include new format doc
* add doxygen-theme-css submodule
* enable theme and disable not needed code references
* hide nav sync button
* css and cleanup
* Move comments to dedicated README to not fail config check
* add bullet points to subpages
* Link to webpage from welcome page
* Add bullet points to subpages
* grouping
* Add TODO note to card database documentation
Added a TODO note for future updates.
* Fix GH alerts commands to be doxygen compatible
