* feature: dashboard CRD list and retrieve API

* minor: Cobj ApiVersion 解析逻辑抽离，补充单元测试

* feature: CustomObjects CURD API

* feature: subscribe API support CustomObject

* feature: examples api support custom_object.

* test: 补充 CRD，CustomObject 单元测试

* minor: update comments

* feature: web_annotations 补充 CRD 自定义展示列
minor: resolve #1239 conversations

* minor: subscribe API drop param custom_obj_kind

* test: mock custom_resource api permissions