Merge branch 'clang-tidy' into 'main'

Add support for clang-tidy

See merge request !26

.clang-tidy

+---
+Checks: >
+  bugprone-*,
+  cert-*,
+  clang-analyzer-*,
+  cppcoreguidelines-*,
+  misc-*,
+  modernize-*,
+  performance-*,
+  portability-*,
+  readability-*,
+  -modernize-use-trailing-return-type,
+  -cppcoreguidelines-owning-memory,
+  -cppcoreguidelines-avoid-magic-numbers,
+  -readability-magic-numbers
+
+WarningsAsErrors: ''
+HeaderFilterRegex: 'src/game/.*'
+FormatStyle: file
+
+CheckOptions:
+  - key: readability-identifier-naming.ClassCase
+    value: camelBack
+  - key: readability-identifier-naming.PrivateMemberPrefix
+    value: m_
+  - key: readability-identifier-naming.MethodCase
+    value: camelBack
+  - key: readability-identifier-naming.ParameterCase
+    value: camelBack
+  - key: readability-identifier-naming.VariableCase
+    value: camelBack
+  - key: readability-identifier-naming.ConstantCase
+    value: UPPER_CASE
+  - key: misc-non-private-member-variables-in-classes.IgnoreClassesWithAllMemberVariablesBeingPublic
+    value: true
+  - key: performance-move-const-arg.CheckTriviallyCopyableMove
+    value: false
+  - key: readability-function-cognitive-complexity.Threshold
+    value: 25
\ No newline at end of file

.gitignore

@@ -56,5 +56,7 @@ coverage/
 
 docs/generated/
 
+clang-tidy-warnings.txt
+
 bin/
 lib/

README.md

 # Advanced Wars
 
+## clang-tidy
+
+- Um `clang-tidy` für eine einzelne Datei (z.B. `main.cpp`) auszuführen:
+
+   `clang-tidy src/game/main.cpp -header-filter="src/game/main\.cpp" -p build/`
+
+- Um `clang-tidy` für das ganze Projekt auszuführen und die Warnings in die Datei `clang-tidy-warnings.txt` zu schreiben:
+
+   `find src/game -name '*.cpp' -o -name '*.hpp' | xargs clang-tidy -header-filter="src/game/.*" -p build/ 1> clang-tidy-warnings.txt`
 ## Build-Anleitung
 
 ### Linux/MacOS