CLI config command enhance

[aiwantaozi]

Update config command from:

 walrus config current-context
 walrus config setup
 walrus config sync

to:

walrus login
walrus context current
walrus context switch

And add API to CLI built-in, remove walrus config sync

[Finenyaco]

Environment

clientVersion:
  version: main
  gitCommit: 7428401fef1d1a45e433c2e7722597a5e12830ef
  isDevVersion: true
serverVersion:
  version: main
  gitCommit: 7428401fef1d1a45e433c2e7722597a5e12830ef
  isDevVersion: true

• log in walrus:

? Server:  https://192.168.50.182
? Token:  (****Giak)
? Insecure:  Yes
? Project:  default
? Environment:  local

• Switch project/environment and show the current context.

 ~/seal/ walrus context switch -e env3
 ~/seal/ walrus context current
Current Project: default
Current Environment: env3
 ~/seal/ walrus context switch -p test-project
 ~/seal/ walrus context current
Current Project: test-project
Current Environment: to be configured
 ~/seal/ walrus context switch -p default -e local
 ~/seal/ walrus context current
Current Project: default
Current Environment: local