[ci] Add clang-tidy support

Fixes #26.

.github/workflows/clang-tidy-review-post.yml

@@ -0,0 +1,30 @@
+name: Post clang-tidy review comments
+
+on:
+  workflow_run:
+    workflows: ["clang-tidy-review"]
+    types:
+      - completed
+
+permissions:
+  checks: write
+  pull-requests: write
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Post review comments
+        id: post-review
+        uses: ZedThree/clang-tidy-review/[email protected]
+        with:
+          max_comments: 10
+
+       # If there are any comments, fail the check
+      - if: steps.post-review.outputs.total_comments > 0
+        run: exit 1

.github/workflows/clang-tidy-review.yml

@@ -0,0 +1,45 @@
+name: clang-tidy-review
+
+on:
+  pull_request:
+    paths:
+      - '**.h'
+      - '**.hpp'
+      - '**.cpp'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout PR branch
+        uses: actions/checkout@v3
+
+      - name: Install LLVM and Clang
+        uses: KyleMayes/install-llvm-action@v1
+        with:
+          version: "12.0.0"
+
+      - name: Run clang-tidy
+        uses: ZedThree/[email protected]
+        id: review
+        with:
+          build_dir: build
+          apt_packages: libxml2,libxml2-dev,libtinfo-dev,zlib1g-dev,libzstd-dev
+          exclude: "test/*,unittests/*,benchmark/*,demos/*"
+          split_workflow: true
+          cmake_command: >
+            pip install cmake lit &&
+            cmake --version &&
+            git config --global --add safe.directory /github/workspace &&
+            cmake . -B build -DLLVM_DIR="$GITHUB_WORKSPACE/llvm"
+            -DClang_DIR="$GITHUB_WORKSPACE/llvm"
+            -DCMAKE_BUILD_TYPE="Release"
+            -DLLVM_EXTERNAL_LIT="`which lit`"
+            -DCMAKE_EXPORT_COMPILE_COMMANDS=On
+
+      - name: Upload artifacts
+        uses: ZedThree/clang-tidy-review/[email protected]