feat: account migration (#10507)

* add Move activity

* add endpoint to move from local to remote

* follow move activity coming to inbox

* fix move endpoint

* add known-as endpoint to create account alias

* add migration page

* add route to migration page

* add move and known-as endpoints

* fix dependnecies error

* fix new endpoints

* fix move activity id

* fix refollow

* add movedToUri and alsoKnownAs to api

* fix moveToUri indicator

* fix missing context

* add chengelog

* rename MkMoved to MkAccountMoved

* add missing semicolon

* fix targetUri

* fix followings query

* remove redundant null check

packages/backend/src/models/entities/User.ts

@@ -68,6 +68,19 @@ export class User {
 	})
 	public followingCount: number;
 
+	@Column('varchar', {
+		length: 512,
+		nullable: true,
+		comment: 'The URI of the new account of the User',
+	})
+	public movedToUri: string | null;
+
+	@Column('simple-array', {
+		nullable: true,
+		comment: 'URIs the user is known as too',
+	})
+	public alsoKnownAs: string[] | null;
+
 	@Column('integer', {
 		default: 0,
 		comment: 'The count of notes.',