添加Gitea Actions示例和说明文档

.gitea/workflows/example.yml

@@ -0,0 +1,26 @@
+name: Gitea Actions 示例
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  example:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: 检出代码
+        uses: https://git.ra3battle.cn/actions/checkout@v4
+        
+      - name: 输出README内容
+        run: cat README.md
+        
+      - name: 打包项目目录
+        run: tar -czf project.tar.gz .
+        
+      - name: 上传artifacts
+        uses: https://git.ra3battle.cn/actions/upload-artifact@v3
+        with:
+          name: project-package
+          path: project.tar.gz