According to planning of 3.0 version, nacos should support console and server dependent deployment. So how to get datum from server in console should be solved.

Current plan is defined a standard AdminAPI to exported datum to console.

What's more standard AdminAPI also can let maintainer and other custom management project to use for fast get datum and maintain nacos servers.

After provide standard AdminAPI in nacos server, 3.0 also plan to support an maintainer SDK to encapsulation the AdminAPI usage, which make maintainer and console call AdminAPI esaier.

TODO List and sub tasks follow:

• Add new standard AdminAPI for core module [Nacos 3.0][Admin API] Rebuild new Admin API for core module. #12983
• Add new standard AdminAPI for naming module [Nacos 3.0][Admin API] Rebuild new naming Admin API.  #12988
• Add new standard AdminAPI for config module [Nacos 3.0][Admin API] Rebuild new config Admin API. #12968
• Add new standard AdminAPI for other sub modules
• Add maintainer SDK in nacos-client module or dependent module like nacos-maintainer-client [Nacos 3.0][Admin API] Support a Maintainer SDK. #12979
• Add usage document for AdminAPI
• Add usage document for maintainer SDK