feat(ci): add release workflow and configuration files (#1)

Reviewed-on: #1
Co-authored-by: Jan Klattenhoff <jan@kjan.email>
Co-committed-by: Jan Klattenhoff <jan@kjan.email>

.gitea/workflows/release.yml

@@ -0,0 +1,74 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - release
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+
+    env:
+      GITEA_DOMAIN: git.kjan.de  # Your Gitea instance domain
+      GIT_EMAIL: "gitea-actions@git.kjan.de"  # Valid email for Git config
+      GIT_USERNAME: "Gitea Actions" # Name for Git config
+      SKIP_MERGE: false # Set to true to skip merging back to main
+      TARGET_BRANCH: main #Branch to merge into
+      RELEASE_BRANCH: release # The name of the release branch
+
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
+      id-token: write
+
+    steps:
+      - name: Create Release
+        uses: https://git.kjan.de/actions/semantic-release@main
+        id: semantic
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+
+      - name: Configure SSH
+        if: ${{ steps.semantic.outputs.new_release_published }}
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.DEPLOY_KEY }}" > ~/.ssh/id_rsa
+          chmod 400 ~/.ssh/id_rsa
+          ssh-keyscan ${{ env.GITEA_DOMAIN }} >> ~/.ssh/known_hosts
+          chmod 400 ~/.ssh/known_hosts
+
+      - name: Configure Git
+        if: ${{ steps.semantic.outputs.new_release_published }}
+        run: |
+          git config --global user.email "${{ env.GIT_EMAIL }}"
+          git config --global user.name "${{ env.GIT_USERNAME }}"
+
+      - name: Make changes
+        if: ${{ steps.semantic.outputs.new_release_published }}
+        run: |
+          git add docs/
+          git commit -m "chore(release): [skip ci]"
+
+      - name: Push changes to release branch
+        if: ${{ steps.semantic.outputs.new_release_published }}
+        run: |
+          git remote set-url origin git@${{ env.GITEA_DOMAIN }}:${{ github.repository }}.git
+          git push origin HEAD:${{ env.RELEASE_BRANCH }}
+
+      - name: Checkout target branch
+        if: ${{ steps.semantic.outputs.new_release_published && !env.SKIP_MERGE }}
+        run: git reset --hard && git checkout ${{ env.TARGET_BRANCH }} && git pull
+
+      - name: Merge release
+        if: ${{ steps.semantic.outputs.new_release_published && !env.SKIP_MERGE }}
+        run: git merge ${{ env.RELEASE_BRANCH }}
+
+      - name: Push changes to target branch
+        if: ${{ steps.semantic.outputs.new_release_published && !env.SKIP_MERGE }}
+        run: |
+          git remote set-url origin git@${{ env.GITEA_DOMAIN }}:${{ github.repository }}.git
+          git push origin HEAD:${{ env.TARGET_BRANCH }}