Toolchain: add .clang-format / .clang-tidy

.clang-format

@@ -0,0 +1,42 @@
+BasedOnStyle: LLVM
+ReflowComments: false
+
+MacroBlockBegin: "^BEGIN_OPERATOR"
+MacroBlockEnd: "^END_OPERATOR"
+
+Language: Cpp
+DerivePointerAlignment: true
+SortIncludes: Never
+PointerAlignment: Left
+AlignAfterOpenBracket: AlwaysBreak
+AlignOperands: AlignAfterOperator
+AlignTrailingComments: true
+AllowAllArgumentsOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLoopsOnASingleLine: false
+BinPackArguments: false
+BinPackParameters: false
+ExperimentalAutoDetectBinPacking: true
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterFunction: true
+ColumnLimit: 100
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+PenaltyBreakBeforeFirstCallParameter: 0
+PenaltyReturnTypeOnItsOwnLine: 1000000
+PenaltyBreakAssignment: 1000000
+PenaltyExcessCharacter: 10
+IndentCaseLabels: true
+IndentWidth: 4
+MaxEmptyLinesToKeep: 2
+NamespaceIndentation: All
+SpaceAfterTemplateKeyword: false
+AccessModifierOffset: -4
+AllowShortBlocksOnASingleLine: Always
+IndentPPDirectives: BeforeHash
+IndentExternBlock: Indent
+Cpp11BracedListStyle: false

.clang-tidy

@@ -0,0 +1,36 @@
+Checks: >
+  -*,
+  -abseil-*,
+  -altera-*,
+  -android-*,
+  boost-*,
+  bugprone-*,
+  cert-*,
+  clang-analyzer-*,
+  concurrency-*,
+  cppcoreguidelines-*,
+  -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+  -cppcoreguidelines-avoid-non-const-global-variables,
+  -cppcoreguidelines-non-private-member-variables-in-classes,
+  darwin-*,
+  -fuchsia-*,
+  -google-*,
+  -hicpp-*,
+  -linuxkernel-*,
+  -llvm-*,
+  -llvmlibc-*,
+  misc-*,
+  -misc-non-private-member-variables-in-classes,
+  modernize-*,
+  -modernize-use-auto,
+  -modernize-use-trailing-return-type,
+  -modernize-use-nodiscard,
+  -mpi-*,
+  -objc-*,
+  -openmp-*,
+  performance-*,
+  portability-*,
+  readability-*,
+  -readability-function-cognitive-complexity,
+  -readability-implicit-bool-conversion,a
+  -zircon-*,