Add an option to the guild.join method to select platform

[KevinLu]

Currently, only the guildId can be passed to the guild.join method, as seen here:
https://github.com/agoraxyz/guild-sdk/blob/66120a1bcbb6bc1b257e1dde490fd4d10328fa65/src/client.ts#L156-L175

However, this won't return the inviteLink and alreadyJoined properties as specified by the type JoinResponse:
https://github.com/agoraxyz/guild-sdk/blob/66120a1bcbb6bc1b257e1dde490fd4d10328fa65/src/types.ts#L8-L11

Can platform and platformUserId be added to guild.join? For example, this is a valid payload:

{
  guildId: 481
  platform: "DISCORD"
  platformUserId: "965726448839163915"
}

[ejayxyz]

Thanks for these issues and reports! Currently, we are refactoring and modularize our backend, and the SDK will change in a few ways. We should wait until those changes are live, then after that we will check back to these issues.

[KevinLu]

Thanks for the reply @ejayxyz , when the backend refactor is complete, will there be breaking changes to this SDK? Can you provide an ETA on the backend refactor?

[ejayxyz]

@KevinLu I would say, we could finish these changes in 2 weeks or so. A few things will change, but not sure about any related breaking change yet. If you create, or manage anything through the SDK, you might have to refactor a bit as well. We are too early to version these things, I would say, but we will think about it.