Build 26174871

* new: resource capture mechanic, resource fields must be captured before they can be extracted (optional in skirmish setup)
* new: territorial attrition, buildings influence territory and units in enemy territory take attrition damage (optional in skirmish setup)
* new: skirmish option to disable super weapons
* new: engineers can repair damaged airplanes parked in the airfield
* new: buttons to replay the intro and outro cutscenes in the campaign screen
* skirmish AI on easy difficulty is now much less aggressive, it defends itself but never goes all in
* rockets now hit random parts of buildings instead of always aiming for the center
* QOL: resource fields are now selectable and highlighted with an outline when hovered
* major performance improvements, especially for fog of war
* fix hearing enemy unit spawn sounds while hidden in the fog
* fix naval unit shadow issues
* multiple bug and crash fixes