Adding clang-tidy file (from jupedsim)

.clang-tidy

+---
+Checks: >-
+  -*,
+  bugprone-*,
+  cppcoreguidelines-*,
+  misc-*,
+  modernize-*,
+  -modernize-use-trailing-return-type,
+  -modernize-use-nodiscard,
+  performance-*,
+  portability-*,
+  readability-*
+WarningsAsErrors:    '*'
+HeaderFilterRegex:   '.*'
+FormatStyle:         none
+CheckOptions:
+  - key:             readability-identifier-naming.ClassCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.FunctionCase
+    value:           camelBack
+  - key:             readability-identifier-naming.MethodCase
+    value:           camelBack
+  - key:             readability-identifier-naming.ParameterCase
+    value:           camelBack
+  - key:             readability-identifier-naming.MacroDefinitionCase
+    value:           UPPER_CASE
+  - key:             readability-identifier-naming.PrivateMemberPrefix
+    value:           m
+  - key:             readability-identifier-naming.PrivateMemberCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.ProtectedMemberPrefix
+    value:           m
+  - key:             readability-identifier-naming.ProtectedMemberCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.StructCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.VariableCase
+    value:           camelBack
+  - key:             readability-identifier-naming.GlobalConstantCase
+    value:           UPPER_CASE
+  - key:             readability-identifier-naming.NamespaceCase
+    value:           camelBack
+...
+