ci(coverage): add grcov coverage pipeline

.github/workflows/coverage.yaml

@@ -0,0 +1,56 @@
+name: Coverage
+on:
+  workflow_dispatch:
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+      - name: Install grcov
+        run: |
+          cargo install grcov
+          rustup component add llvm-tools-preview
+      - name: Run tests
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: -Cinstrument-coverage
+          LLVM_PROFILE_FILE: cargo-test-%p-%m.profraw
+        run: cargo test
+      - name: Generate coverage report
+        run: |
+          grcov . \
+            --binary-path ./target/debug/deps/ \
+            -s . -t html \
+            --branch \
+            --ignore-not-existing \
+            --ignore '../*' \
+            --ignore "/*" \
+            -o target/coverage
+          ls target/coverage
+          jq < target/coverage/coverage.json
+      - name: Generate docs
+        run: |
+          cargo doc --workspace --no-deps
+      - name: Prepare deploy
+        run: |
+          mkdir public
+          mv target/coverage public/
+          mv target/doc public/
+      - name: Deploy artifacts
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./public
+          publish_branch: docs-coverage
+