[feature] Process outgoing Move from clientAPI (#2750)

* prevent moved accounts from taking create-type actions

* update move logic

* federate move out

* indicate on web profile when an account has moved

* [docs] Add migration docs section

* lock while checking + setting move state

* use redirectFollowers func for clientAPI as well

* comment typo

* linter? i barely know 'er!

* Update internal/uris/uri.go

Co-authored-by: Daenney <daenney@users.noreply.github.com>

* add a couple tests for move

* fix little mistake exposed by tests (thanks tests)

* ensure Move marked as successful

* attach shared util funcs to struct

* lock whole account when doing move

* move moving check to after error check

* replace repeated text with error func

* linterrrrrr!!!!

* catch self follow case

---------

Co-authored-by: Daenney <daenney@users.noreply.github.com>

internal/state/state.go

@@ -50,6 +50,12 @@ type State struct {
 	// functions, and by the go-fed/activity library.
 	FedLocks mutexes.MutexMap
 
+	// ClientLocks provides access to this state's
+	// mutex map of per URI client locks.
+	//
+	// Used during account migration actions.
+	ClientLocks mutexes.MutexMap
+
 	// Storage provides access to the storage driver.
 	Storage *storage.Driver