Merge branch 'main' into 'load-save-functionality'

src/main/java/bitsplease/mummymayhem/GameLoop.java

src/main/java/bitsplease/mummymayhem/GameViewController.java

src/main/java/bitsplease/mummymayhem/model/GameModel.java

src/main/java/bitsplease/mummymayhem/model/PhaseType.java

src/main/java/bitsplease/mummymayhem/model/Player.java

...java/bitsplease/mummymayhem/model/buildings/Building.java

...n/java/bitsplease/mummymayhem/model/buildings/Castle.java

...in/java/bitsplease/mummymayhem/model/buildings/Tower.java

src/main/java/bitsplease/mummymayhem/model/map/Field.java

...n/java/bitsplease/mummymayhem/model/units/Demolisher.java

src/main/java/bitsplease/mummymayhem/model/units/Unit.java

...java/bitsplease/mummymayhem/model/utils/ImageStorage.java

...ain/java/bitsplease/mummymayhem/model/utils/Renderer.java

src/main/resources/assets/buildings/ruined-tower.png

src/main/resources/assets/buildings/tower-projectile.png

src/main/resources/assets/images/health-bar-bg.png

src/main/resources/assets/images/health-bar-playerA.png

src/main/resources/assets/images/health-bar-playerB.png

src/main/resources/bitsplease/mummymayhem/mmstyle.css

...test/java/bitsplease/mummymayhem/model/GameModelTest.java