Implement OAuth2 Client

[Hoto-Cocoa]

See misskey-dev/misskey#13346.

Requirements

• [X] Create model
• [X] Add admin API
  • [X] Create
  • [X] Update
• [X] Add user API
  • [X] List
• [x] OAuth2 auth flow
  • [X] Authorize (Start)
  • [X] Endpoint
  • [X] Get profile data
  • [x] Signup/Signin
• [ ] Restrict to OAuth2 only
• [ ] Move page when sign up (If single client -> without modal else show modal)
• [ ] Frontend
  • [ ] Select auth source
  • [x] Auth flow

TODO

• random state -> how to store to service side store?
• add icon url/enabled column to model
• add some test code?

[Hoto-Cocoa]

Multiple OAuth2 connections to user? N-N map table?

[Hoto-Cocoa]

Change idPath to usernamePath? (not matched)

[Hoto-Cocoa]

Change idPath to usernamePath? (not matched)

idPath and usernamePath both exists, should remove idPath

[Hoto-Cocoa]

and maybe required to change title to name

[Hoto-Cocoa]

Change idPath to usernamePath? (not matched)

idPath and usernamePath both exists, should remove idPath

NO

[Hoto-Cocoa]

should add remove integration page in settings

[Hoto-Cocoa]

should to change oauth2 comsumer to api and copy welcome.setup.vue?

[Hoto-Cocoa]

https://hoto.moe/notes/9q2i5mg1kh