Add Forgejo CI workflow to build and release the plugin

.forgejo/workflows/build.yml

@@ -0,0 +1,67 @@
+name: Build plugin
+
+on:
+  push:
+    branches: [trunk]
+    tags: ["v*"]
+  pull_request:
+    branches: [trunk]
+
+jobs:
+  build:
+    runs-on: [docker, ubuntu-24.04]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y -qq make git wget unzip
+
+      - name: Install Godot
+        run: |
+          wget -q https://github.com/godotengine/godot/releases/download/4.4.1-stable/Godot_v4.4.1-stable_linux.x86_64.zip
+          unzip -q Godot_v4.4.1-stable_linux.x86_64.zip
+          mkdir -p "$HOME/.local/bin"
+          mv Godot_v4.4.1-stable_linux.x86_64 "$HOME/.local/bin/godot"
+          chmod +x "$HOME/.local/bin/godot"
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+
+      - name: Build
+        env:
+          GODOT: godot
+        run: make dist
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: itch-${{ github.ref_name || github.sha }}
+          path: dist/itch.zip
+
+      - name: Create release
+        if: startsWith(github.ref, 'refs/tags/v')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TAG="${GITHUB_REF_NAME}"
+          API="${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}"
+
+          # Create the release
+          curl -sf -X POST "${API}/releases" \
+            -H "Authorization: token ${GITHUB_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\":\"${TAG}\",\"name\":\"${TAG}\"}" \
+            -o /tmp/release.json
+
+          RELEASE_ID=$(python3 -c "import json; print(json.load(open('/tmp/release.json'))['id'])")
+
+          # Upload assets
+          for FILE in dist/itch.zip dist/itch.zip.sha256.txt; do
+            NAME=$(basename "$FILE")
+            curl -sf -X POST \
+              "${API}/releases/${RELEASE_ID}/assets?name=${NAME}" \
+              -H "Authorization: token ${GITHUB_TOKEN}" \
+              -H "Content-Type: application/octet-stream" \
+              --data-binary "@${FILE}"
+          done