Person: support movedTo

[Mstrodl]

#5475

What

Supports movedTo attribute on Person

Why

I tried to follow a friend on the wrong account! Now, a warning will appear to tell me they have a different account.

Additional info (optional)

[Mstrodl]

Note: this doesn't touch the renderer at all, and users on misskey can't set it for themselves. This is only for remote users for now.

[Mstrodl]

Also, I noticed the wrong locales tag

I don't know japanese, sorry

[tamaina]

I have added one commit, please try it.

[tamaina]

In this PR, you have not written the Move activity process, so I think movedTo is only written when a new user is acquired. (If actor update is emitted, it's not a problem).

[tamaina]

Actor Updateを処理するのはこのPRで実装したい

[tamaina]

🙏🙏🙏