feat: Tag管理功能 + 打包脚本优化 + CI/CD发布流水线

- 新增标签管理: 列表/创建/删除/推送标签 (后端API + 前端UI)
- 前端新增标签Tab页，支持创建、删除、推送操作
- config.go 改为从可执行文件同目录加载 config.yaml
- 各平台构建脚本自动复制 config.yaml 到输出目录
- Windows 打包改为 ZIP 格式 (不依赖 NSIS)
- 新增 GitHub Actions Release 工作流 (三平台自动构建+发布)

bin/config.yaml

@@ -0,0 +1,41 @@
+platforms:
+  gitea:
+    base_url: http://192.168.1.10:3000
+    users: []
+  gitee:
+    base_url: ""
+    users:
+      - username: zhuyuj
+        token: ""
+        projects: []
+  github:
+    base_url: ""
+    users:
+      - username: zhuy1228
+        token: ""
+        projects:
+          - name: GitPilot
+            path: F:\Project\GitPilot
+            enabled: false
+          - name: nakama
+            path: F:\Project\nakama
+            enabled: false
+          - name: DevPack
+            path: F:\Project\DevPack
+            enabled: false
+          - name: go-desk-service
+            path: F:\Project\go-desk\go-desk-service
+            enabled: false
+          - name: go-desk-wails
+            path: F:\Project\go-desk\go-desk-wails
+            enabled: false
+          - name: go-game
+            path: F:\Project\go-game
+            enabled: false
+          - name: PeterAgent
+            path: F:\Project\PeterAgent
+            enabled: false
+settings:
+  concurrency: 6
+  network_check: true
+  log_level: info