chore: add new workflows (changelog, automatic releases)

Docker images will now be built on every release

.gitea/workflows/02_release.yaml

@@ -0,0 +1,34 @@
+# Credits: # https://gitea.com/gitea/runner-images/src/branch/main/.gitea/workflows/release.yaml
+name: Release new version
+run-name: Release ${{  github.ref_name }}
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    container: docker.io/thegeeklab/git-sv:2.0.9
+    steps:
+      - name: install tools
+        run: |
+          apk add -q --update --no-cache nodejs
+      - uses: actions/checkout@v6
+        with:
+          fetch-tags: true
+          fetch-depth: 0
+
+      - name: Create changelog
+        run: |
+          git sv current-version
+          git sv release-notes -t ${GITHUB_REF#refs/tags/} -o CHANGELOG.md
+          sed -i '1,2d' CHANGELOG.md # remove version
+          cat CHANGELOG.md
+
+      - name: Release
+        uses: https://github.com/akkuman/gitea-release-action@v1
+        with:
+          body_path: CHANGELOG.md
+          token: "${{ secrets.REPO_RW_TOKEN }}"