Added .clang-format and .clang-tidy. No code changes. (0.41.5)

.clang-format

@@ -0,0 +1,18 @@
+BasedOnStyle: LLVM
+IndentWidth: 2
+TabWidth: 2
+UseTab: Never
+ContinuationIndentWidth: 2
+AccessModifierOffset: -2
+BraceWrapping:
+  AfterControlStatement: false
+  AfterEnum: false
+  AfterFunction: false
+  AfterNamespace: false
+  AfterStruct: false
+  BeforeElse: false
+  IndentBraces: false
+ColumnLimit: 0
+AllowShortIfStatementsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: Inline
+PenaltyExcessCharacter: 50

.clang-tidy

@@ -0,0 +1,7 @@
+Checks: >
+  clang-analyzer-*,
+  bugprone-*,
+  performance-*
+WarningsAsErrors: ""
+HeaderFilterRegex: ".*"
+FormatStyle: none

.gitignore

@@ -1,6 +1,8 @@
 CMakeCache.txt
 Doxyfile
 .*
+!.clang-format
+!.clang-tidy
 !.editorconfig
 !.gitignore
 !.github