Adds some documentation, add .clang-tidy file.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

.clang-tidy

@@ -0,0 +1,11 @@
+Checks: 'readability-*,clang-diagnostic-*,clang-analyzer-*,-clang-analyzer-alpha*,performance-*,cppcoreguidelines-*,
+bugprone-*,modernize-*,-modernize-use-trailing-return-type'
+HeaderFilterRegex: ''
+AnalyzeTemporaryDtors: false
+CheckOptions:
+  - key: readability-identifier-naming.ClassCase
+    value: CamelCase
+  - key: readability-identifier-naming.PrivateMemberCase
+    value: camelBack
+  - key: readability-identifier-naming.PrivateMemberPrefix
+    value: '_'