ci: release GHA (cairo-book#689)

Author: enitrat

.github/workflows/release.yml

@@ -0,0 +1,52 @@
+name: Build and Release mdbook
+
+permissions:
+  contents: write
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Rust cache
+        uses: ./.github/workflows/setup-rust-cache
+
+      - name: Install mdbook
+        uses: ./.github/workflows/install-mdbook
+
+      - name: Build book (English)
+        run: mdbook build -d book
+
+      - name: Create ZIP file
+        run: zip -r markdown-output.zip book/markdown
+
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: false
+
+      - name: Upload Release Asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./markdown-output.zip
+          asset_name: markdown-output.zip
+          asset_content_type: application/zip