chore: 公开发布准备 - 脱敏与规范对齐

- 截图敏感信息打码（测试邮箱、内网 IP）
- plugin.yaml 地址改为 GitHub，author 对齐 GitHub 账号，补 version 占位
- 新增 GitHub Actions（halo-sigs plugin-ci/cd 工作流）与 .editorconfig
- console 前端产物纳入仓库（CI skip-node-setup）
- AGENTS.md 移出公开仓库（保留本地）
- README 增加安装说明

src/main/resources/plugin.yaml

@@ -6,14 +6,15 @@ spec:
   enabled: true
   requires: ">=2.22.0"
   author:
-    name: ssy
-    website: https://git.ali.songshiyu.cn/ssy
+    name: shirainbown
+    website: https://github.com/shirainbown
   logo: logo.svg
-  homepage: https://git.ali.songshiyu.cn/ssy/sharelink
-  repo: https://git.ali.songshiyu.cn/ssy/sharelink
-  issues: https://git.ali.songshiyu.cn/ssy/sharelink/issues
+  homepage: https://github.com/shirainbown/plugin-sharelink
+  repo: https://github.com/shirainbown/plugin-sharelink
+  issues: https://github.com/shirainbown/plugin-sharelink/issues
   displayName: "资源下载管理"
   description: "管理文章中的资源下载链接：下载统计、按资源的邮箱验证、防止附件直链下载、文章引用扫描。"
+  version: "@version@"
   configMapName: sharelink-configmap
   settingName: sharelink-settings
   license: