Merge pull request #27 from alandtse/clang

ci: add clang format action

.clang-format-ignore

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+#ignore third party
+./extern/*
+./include/*

.github/workflows/clang_format.yml

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+name: Run clang-format Linter
+
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    permissions:
+      # Give the default GITHUB_TOKEN write permission to commit and push the
+      # added or changed files to the repository.
+      contents: write
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          # check out HEAD on the branch
+          ref: ${{ github.head_ref }}
+          # make sure the parent commit is grabbed as well, because
+          # that's what will get formatted (i.e. the most recent commit)
+          fetch-depth: 2
+      # format the latest commit
+      - uses: DoozyX/[email protected]
+        with:
+          source: "."
+          exclude: "extern include"
+          extensions: "h,cpp,c,hlsl,hlsli"
+          clangFormatVersion: 16
+          inplace: True # commit the changes (if there are any)
+      - name: Commit changes
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: "style: 🎨 apply clang-format changes"
+          branch: ${{ github.head_ref }}