add .clang-format file, pre-commit configuration file and GitHub Action to run pre-commit with clang-format

.clang-format

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+# Google C/C++ Code Style settings
+# https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+
+Language: Cpp
+BasedOnStyle: Google
+AccessModifierOffset: -1
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: None
+AlignOperands: Align
+AllowAllArgumentsOnNextLine: true
+AllowAllConstructorInitializersOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: Empty
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Inline
+AllowShortIfStatementsOnASingleLine: Never  # To avoid conflict, set this "Never" and each "if statement" should include brace when coding
+AllowShortLambdasOnASingleLine: Inline
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterReturnType: None
+AlwaysBreakTemplateDeclarations: Yes
+BinPackArguments: true
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: false
+  AfterClass: false
+  AfterStruct: false
+  AfterControlStatement: Never
+  AfterEnum: false
+  AfterFunction: false
+  AfterNamespace: false
+  AfterUnion: false
+  AfterExternBlock: false
+  BeforeCatch: false
+  BeforeElse: false
+  BeforeLambdaBody: false
+  IndentBraces: false
+  SplitEmptyFunction: false
+  SplitEmptyRecord: false
+  SplitEmptyNamespace: false
+BreakBeforeBinaryOperators: None
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeColon
+BreakInheritanceList: BeforeColon
+ColumnLimit: 120
+CompactNamespaces: false
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false  # Make sure the * or & align on the left
+EmptyLineBeforeAccessModifier: LogicalBlock
+FixNamespaceComments: true
+IncludeBlocks: Preserve
+IndentCaseLabels: true
+IndentPPDirectives: None
+IndentWidth: 2
+KeepEmptyLinesAtTheStartOfBlocks: true
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PointerAlignment: Left
+ReflowComments: false
+# SeparateDefinitionBlocks: Always   # Only support since clang-format 14
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceBeforeSquareBrackets: false
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles: false
+SpacesInCStyleCastParentheses: false
+SpacesInContainerLiterals: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: c++11
+TabWidth: 4
+UseTab: Never
+InsertNewlineAtEOF: true

.github/workflows/run-pre-commit.yml

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+# This GithHub Action runs the pre-commit defined in the .pre-commit-config.yaml file
+
+name: Run pre-commit
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Run pre-commit
+      uses: pre-commit/action@v3.0.0

.pre-commit-config.yaml

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+# This pre-commit configuration file configures clang-format to run upon running the command line command 'git commit'.
+# The pre-commit git hook is installed using the command line command 'pre-commit install'.
+
+exclude: '^Software/src/lib/'  # don't run hooks on external libraries
+
+repos:
+- repo: https://github.com/pre-commit/mirrors-clang-format
+  rev: v17.0.4
+  hooks:
+  - id: clang-format
+    args: [-Werror]  # change formatting warnings to errors, hook includes -i (Inplace edit) by default
+    types_or: [c++, c]  # override default file types to only C and CPP files