github actions: add cpp-lint action

.clang-format

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+# The style used for all options not specifically set in the configuration.
+BasedOnStyle: LLVM
+
+# The extra indent or outdent of access modifiers, e.g. public:.
+AccessModifierOffset: -4
+
+# Aligns escaped newlines as far left as possible
+AlignEscapedNewlines: Left
+
+# This will align the assignment operators of consecutive lines.
+AlignConsecutiveAssignments: Consecutive
+
+# Do not align the declaration names.
+AlignConsecutiveDeclarations: None
+
+# Align the bitfield in declarations
+AlignConsecutiveBitFields: Consecutive
+
+# If true, aligns trailing comments.
+AlignTrailingComments: true
+
+# Align operands when the expression is broken in multiple lines.
+AlignOperands: Align
+
+# Allow putting all parameters of a function declaration onto the next line even if BinPackParameters is false.
+AllowAllParametersOfDeclarationOnNextLine: false
+
+# Allows contracting simple braced statements to a single line.
+AllowShortBlocksOnASingleLine: false
+
+# If true, short case labels will be contracted to a single line.
+AllowShortCaseLabelsOnASingleLine: false
+
+# Dependent on the value, int f() { return 0; } can be put on a single line. Possible values: None, Inline, All.
+AllowShortFunctionsOnASingleLine: None
+
+# If true, if (a) return; can be put on a single line.
+AllowShortIfStatementsOnASingleLine: false
+
+# If true, while (true) continue; can be put on a single line.
+AllowShortLoopsOnASingleLine: false
+
+# If true, always break after function definition return types.
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+
+# If true, always break before multiline string literals.
+AlwaysBreakBeforeMultilineStrings: false
+
+# If true, always break after the template<...> of a template declaration.
+AlwaysBreakTemplateDeclarations: Yes
+
+# If false, a function call's arguments will either be all on the same line or will have one line each.
+BinPackArguments: true
+
+# If false, a function declaration's or function definition's parameters will either all be on the same line
+# or will have one line each.
+BinPackParameters: true
+
+# The way to wrap binary operators. Possible values: None, NonAssignment, All.
+BreakBeforeBinaryOperators: None
+
+# The brace breaking style to use. Possible values: Attach, Linux, Stroustrup, Allman, GNU.
+BreakBeforeBraces: Allman
+
+# If true, ternary operators will be placed after line breaks.
+BreakBeforeTernaryOperators: false
+
+# Always break constructor initializers before commas and align the commas with the colon.
+BreakConstructorInitializers: BeforeComma
+
+# The column limit. A column limit of 0 means that there is no column limit.
+ColumnLimit: 120
+
+# A regular expression that describes comments with special meaning, which should not be split into lines or otherwise changed.
+CommentPragmas: '^ *'
+
+# If the constructor initializers don't fit on a line, put each initializer on its own line.
+PackConstructorInitializers: CurrentLine
+
+# The number of characters to use for indentation of constructor initializer lists.
+ConstructorInitializerIndentWidth: 4
+
+# Indent width for line continuations.
+ContinuationIndentWidth: 4
+
+# If true, format braced lists as best suited for C++11 braced lists.
+Cpp11BracedListStyle: true
+
+# Disables formatting at all.
+DisableFormat: false
+
+# Indent case labels one level from the switch statement.
+# When false, use the same indentation level as for the switch statement.
+# Switch statement body is always indented one level more than case labels.
+IndentCaseLabels: false
+
+# The number of columns to use for indentation.
+IndentWidth: 4
+
+# Indent if a function definition or declaration is wrapped after the type.
+IndentWrappedFunctionNames: false
+
+# If true, empty lines at the start of blocks are kept.
+KeepEmptyLinesAtTheStartOfBlocks: true
+
+# Language, this format style is targeted at. Possible values: None, Cpp, Java, JavaScript, Proto.
+Language: Cpp
+
+# The maximum number of consecutive empty lines to keep.
+MaxEmptyLinesToKeep: 1
+
+# The indentation used for namespaces. Possible values: None, Inner, All.
+NamespaceIndentation: None
+
+# The penalty for breaking a function call after "call(".
+PenaltyBreakBeforeFirstCallParameter: 19
+
+# The penalty for each line break introduced inside a comment.
+PenaltyBreakComment: 300
+
+# The penalty for breaking before the first <<.
+PenaltyBreakFirstLessLess: 400
+
+# The penalty for each line break introduced inside a string literal.
+PenaltyBreakString: 1000
+
+# The penalty for each character outside of the column limit.
+PenaltyExcessCharacter: 1000000
+
+# Penalty for putting the return type of a function onto its own line.
+PenaltyReturnTypeOnItsOwnLine: 1000000000
+
+# Pointer and reference alignment style. Possible values: Left, Right, Middle.
+PointerAlignment: Right
+
+# Do not sort includes, many generated headers don't appropriately include what they rely on.
+SortIncludes: Never
+
+# If true, a space may be inserted after C style casts.
+SpaceAfterCStyleCast: false
+
+# If false, spaces will be removed before assignment operators.
+SpaceBeforeAssignmentOperators: true
+
+# Defines in which cases to put a space before opening parentheses. Possible values: Never, ControlStatements, Always.
+SpaceBeforeParens: ControlStatements
+
+# If true, spaces may be inserted into '()'.
+SpaceInEmptyParentheses: false
+
+# The number of spaces before trailing line comments (// - comments).
+SpacesBeforeTrailingComments: 1
+
+# If true, spaces will be inserted after '<' and before '>' in template argument lists.
+SpacesInAngles: false
+
+# If true, spaces may be inserted into C style casts.
+SpacesInCStyleCastParentheses: false
+
+# If true, spaces are inserted inside container literals (e.g. ObjC and Javascript array and dict literals).
+SpacesInContainerLiterals: false
+
+# If true, spaces will be inserted after '(' and before ')'.
+SpacesInParentheses: false
+
+# If true, spaces will be inserted after '[' and before ']'.
+SpacesInSquareBrackets: false
+
+# Format compatible with this standard, e.g. use A<A<int> > instead of A<A<int>> for LS_Cpp03. Possible values: Cpp03, Cpp11, Auto.
+Standard: Cpp11
+
+# The number of columns used for tab stops.
+TabWidth: 4
+
+# The way to use tab characters in the resulting file. Possible values: Never, ForIndentation, Always.
+UseTab: Never
+
+# Support formatting other languages too, mostly using default configs
+---
+Language: Java
+IndentWidth: 4
+---
+Language: Json
+IndentWidth: 4
+---
+Language: ObjC
+IndentWidth: 4
+BreakBeforeBraces: Allman

.github/workflows/cpp-linter.yml

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+name: cpp-linter
+
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the main branch
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  cpp-linter:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cpp-linter/cpp-linter-action@main
+        id: linter
+        continue-on-error: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          style: file
+          lines-changed-only: true
+          format-review: true
+          thread-comments: update
+          ignore: '.github|build'
+
+      - name: Check for linter errors
+        if: steps.linter.outputs.checks-failed != 0
+        run: |
+          echo "Some linter checks failed. ${{ steps.linter.outputs.checks-failed }}"
+          exit 1