ci: add pre-release workflow (#4)

Reviewed-on: #4
Co-authored-by: t.behrendt <t.behrendt@t00n.de>
Co-committed-by: t.behrendt <t.behrendt@t00n.de>

.gitea/actions/release-git-tag/action.yaml

@@ -0,0 +1,15 @@
+name: Release Git tag
+description: Release the Git tag
+
+inputs:
+  tag:
+    description: The tag to release
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - shell: bash
+      run: |
+        git tag ${{ inputs.tag }}
+        git push origin ${{ inputs.tag }}