Add release automation for GitHub and Gitea

.drone.yml

@@ -0,0 +1,39 @@
+kind: pipeline
+type: docker
+name: build-release
+
+trigger:
+  event:
+    - tag
+  ref:
+    - refs/tags/v*
+
+steps:
+  - name: build
+    image: alpine:latest
+    commands:
+      - apk add --no-cache bash zip
+      - VERSION=${DRONE_TAG#v}
+      - mkdir -p build/plugin-reference-cleaner
+      - cp plugin-reference-cleaner.php build/plugin-reference-cleaner/
+      - cp readme.txt build/plugin-reference-cleaner/
+      - cp LICENSE build/plugin-reference-cleaner/
+      - cp README.md build/plugin-reference-cleaner/
+      - cp CHANGELOG.md build/plugin-reference-cleaner/
+      - cd build
+      - zip -r ../plugin-reference-cleaner-$VERSION.zip plugin-reference-cleaner
+      - cd ..
+      
+  - name: release
+    image: plugins/gitea-release
+    settings:
+      api_key:
+        from_secret: gitea_token
+      base_url: https://gitea.wpallstars.com
+      files:
+        - plugin-reference-cleaner-*.zip
+      title: Release ${DRONE_TAG}
+      note: |
+        Plugin Reference Cleaner ${DRONE_TAG}
+        
+        See [CHANGELOG.md](https://gitea.wpallstars.com/wpallstars/plugin-reference-cleaner/src/branch/main/CHANGELOG.md) for details.