Make the main menu look better (closes #144 and #113 and #41)

Closes #41, #113, and #144

See merge request szt-ab-2022/group-01/tree-o!98

fix possibly infinite loops in tests (closes #139)

Closes #139

See merge request szt-ab-2022/group-01/tree-o!97

Make the game world look better (closes #111 and #77)

Closes #77 and #111

See merge request szt-ab-2022/group-01/tree-o!96

Make the lasers look better (closes #141)

Closes #141

See merge request szt-ab-2022/group-01/tree-o!95

Make the castle health visible in any game phase (closes #101)

Closes #101

See merge request szt-ab-2022/group-01/tree-o!94

Document Presentation.World (closes #130)

Closes #130

See merge request szt-ab-2022/group-01/tree-o!91

Document Presentation.UI (closes #131)

Closes #131

See merge request szt-ab-2022/group-01/tree-o!90

Create less complex test cases (closes #132)

Closes #132

See merge request szt-ab-2022/group-01/tree-o!92

Balancing on towers, renaming units (closes #138)

Closes #138

See merge request szt-ab-2022/group-01/tree-o!88

Turrets have different textures for different levels (closes #106)

Closes #106

See merge request szt-ab-2022/group-01/tree-o!87

Display destroyed towers (closes #137 and #115)

Closes #115 and #137

See merge request szt-ab-2022/group-01/tree-o!86

Test tower building, upgrading and destruction (closes #126)

Closes #126

See merge request szt-ab-2022/group-01/tree-o!84

CI: set code coverage flags (assemblyFilter, etc) (closes #136)

Closes #136

See merge request szt-ab-2022/group-01/tree-o!85