ci: add release workflow

.github/workflows/release.yaml

@@ -0,0 +1,86 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - v*
+
+concurrency:
+  group: '${{ github.workflow }} @ ${{ github.ref }}'
+  cancel-in-progress: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Checkout Flatpak repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          branch: flatpak-repository
+          path: repo
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.12
+      - name: Setup GPG
+        id: gpg
+        uses: crazy-max/ghaction-import-gpg@v5
+        with:
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
+          git_config_global: true
+          git_user_signingkey: true
+          git_commit_gpgsign: true
+      - name: Install dependencies
+        run: |
+          DEBIAN_FRONTEND=noninteractive sudo apt-get update -y
+          sudo apt-get install --no-install-recommends -y \
+            icoutils \
+            flatpak \
+            flatpak-builder \
+            elfutils
+          flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+      - name: Cache Flatpak builder
+        id: cache-flatpak-builder
+        uses: actions/cache@v3
+        with:
+          path: .flatpak-builder
+          key: ${{ runner.os }}-flatpak-builder-${{ hashFiles('com.jagex.Launcher.yaml') }}
+      - name: Build Flatpak
+        run: |
+          ./build.sh sign
+      # Now we have a com.jagex.Launcher.flatpak file in the root of the repository and an updated repo/ repository.
+      - name: Create release
+        id: create-release
+        uses: actions/create-release@v1
+        with:
+          tag_name: ${{ github.sha }}
+          release_name: ${{ github.sha }}
+          draft: false
+          prerelease: false
+      - name: Upload Flatpak
+        uses: actions/upload-release-asset@v1
+        with:
+          upload_url: ${{ steps.create-release.outputs.upload_url }}
+          asset_path: com.jagex.Launcher.flatpak
+          asset_name: com.jagex.Launcher.flatpak
+          asset_content_type: application/x-flatpak
+      - name: Push Flatpak repository
+        run: |
+          git config --global user.name "GitHub Actions"
+          git config --global user.email 'bot@noreply.github.com'
+      - name: Commit changes to databases
+        run: |
+          cd repo
+          git add -A
+          git commit --signoff -m "Update com.jagex.Launcher"
+          git push
+        env:
+          GIT_AUTHOR_NAME: ${{ steps.import-gpg.outputs.name }}
+          GIT_AUTHOR_EMAIL: ${{ steps.import-gpg.outputs.email }}
+          GIT_COMMITTER_NAME: ${{ steps.import-gpg.outputs.name }}
+          GIT_COMMITTER_EMAIL: ${{ steps.import-gpg.outputs.email }}