ci: Add Gitea release workflow

Adapté depuis fvtt-te-deum, avec :
- Étape npm ci + npm run build:full (compilation CSS et packs)
- Zip incluant css/ fonts/ images/ lang/ packs/ src/ templates/
- Substitution version/manifest/download dans system.json
- Publication sur le serveur FoundryVTT (compatibility 13)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.gitea/workflows/release.yaml

@@ -0,0 +1,73 @@
+name: Release Creation
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "💡 The ${{ gitea.repository }} repository will be cloned to the runner."
+
+      - uses: https://github.com/RouxAntoine/checkout@v3.5.4
+
+      # Get part of the tag after the `v`
+      - name: Extract tag version number
+        id: get_version
+        uses: https://github.com/battila7/get-version-action@v2
+
+      # Install Node.js and build CSS + packs
+      - name: Setup Node.js
+        uses: https://github.com/actions/setup-node@v3
+        with:
+          node-version: "20"
+
+      - name: Install dependencies and build
+        run: |
+          npm ci
+          npm run build:full
+
+      # Substitute the Manifest and Download URLs in the system.json
+      - name: Substitute Manifest and Download Links For Versioned Ones
+        id: sub_manifest_link_version
+        uses: https://github.com/microsoft/variable-substitution@v1
+        with:
+          files: "system.json"
+        env:
+          version: ${{steps.get_version.outputs.version-without-v}}
+          url: https://www.uberwald.me/gitea/${{gitea.repository}}
+          manifest: https://www.uberwald.me/gitea/public/fvtt-chroniques-de-l-etrange/releases/download/latest/system.json
+          download: https://www.uberwald.me/gitea/public/fvtt-chroniques-de-l-etrange/releases/download/${{github.event.release.tag_name}}/fvtt-chroniques-de-l-etrange.zip
+
+      # Create a zip file with all files required by the system
+      - run: |
+          apt update -y
+          apt install -y zip
+
+      - run: zip -r ./fvtt-chroniques-de-l-etrange.zip system.json README.md CHANGELOG.md LICENSE.txt css/ fonts/ images/ lang/ packs/ src/ templates/
+
+      - name: Setup Go
+        uses: https://github.com/actions/setup-go@v4
+        with:
+          go-version: ">=1.20.1"
+
+      - name: Upload release assets
+        id: use-go-action
+        uses: https://gitea.com/actions/release-action@main
+        with:
+          files: |-
+            ./fvtt-chroniques-de-l-etrange.zip
+            system.json
+          api_key: "${{secrets.ALLOW_PUSH_RELEASE}}"
+
+      - name: Publish to Foundry server
+        uses: https://github.com/djlechuck/foundryvtt-publish-package-action@v1
+        with:
+          token: ${{ secrets.FOUNDRYVTT_RELEASE_TOKEN }}
+          id: 'fvtt-chroniques-de-l-etrange'
+          version: ${{github.event.release.tag_name}}
+          manifest: 'https://www.uberwald.me/gitea/public/fvtt-chroniques-de-l-etrange/releases/download/latest/system.json'
+          notes: 'https://www.uberwald.me/gitea/${{gitea.repository}}/releases/download/${{github.event.release.tag_name}}/fvtt-chroniques-de-l-etrange.zip'
+          compatibility-minimum: '13'
+          compatibility-verified: '13'