新增 AGC 通用插件宿主与 SDK

统一 Agent Plugin、Skill、MCP 的来源索引和启停状态
新增通用进程宿主、JSON-RPC、能力注册、权限审计与面板挂载
新增 AGC Plugin SDK 与标准 plugin.json 解析支持
保留 EditorAdapter 扩展点，不内置具体编辑器适配器
补充运行时设置界面、项目上下文同步和定向测试
同步更新插件方案、DirectProject、workspace 与项目记忆文档

scripts/check-npm-workspaces.mjs

@@ -12,6 +12,7 @@ export const REQUIRED_WORKSPACES = Object.freeze([
   'apps/preview-deployer-web',
   'packages/image-canvas-core',
   'packages/image-canvas-react',
+  'packages/agc-plugin-sdk',
   'packages/shared',
   'tools/spine-json-export-validator',
 ]);
@@ -24,6 +25,7 @@ const WORKSPACE_NAMES = Object.freeze({
   'apps/preview-deployer-web': '@genarrative/preview-deployer-web',
   'packages/image-canvas-core': '@genarrative/image-canvas-core',
   'packages/image-canvas-react': '@genarrative/image-canvas-react',
+  'packages/agc-plugin-sdk': '@genarrative/agc-plugin-sdk',
   'packages/shared': '@genarrative/shared',
   'tools/spine-json-export-validator':
     '@genarrative/spine-json-export-validator',

scripts/check-npm-workspaces.test.mjs

@@ -20,6 +20,7 @@ const workspaceNames = {
   'apps/preview-deployer-web': '@genarrative/preview-deployer-web',
   'packages/image-canvas-core': '@genarrative/image-canvas-core',
   'packages/image-canvas-react': '@genarrative/image-canvas-react',
+  'packages/agc-plugin-sdk': '@genarrative/agc-plugin-sdk',
   'packages/shared': '@genarrative/shared',
   'tools/spine-json-export-validator':
     '@genarrative/spine-json-export-validator',