* Add local game options dialog. Introduces LocalGameOptions struct and DlgLocalGameOptions dialog to replace the previous QInputDialog for starting local games. Encapsulates game configuration with a simple interface that prevents parameter explosion as options are added. The dialog provides UI with settings persistence via SettingsCache
* integrate local game options into main window. Replaces QInputDialog with DlgLocalGameOptions in actSinglePlayer(). The startLocalGame() function now accepts LocalGameOptions, enabling configuration of starting life total and spectator visibility in addition to player count. Also adds user documentation for the local game options flow.
* Removed superfluous documentation file
* removed spectator option and moved structure definition
* Now remember settings separately and & shortcuts removed
* re-run checks
* 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
