Finally, the remote ocr workflow (#13637)

* Ok! Backend stuff for the remote ocr workflow

* Frotnend workflow stuff

* And docs

* Fix dynamic action fields thing

* Actually, fix the action dropdown thing

* Fix this validation thing, and we have to check existing actions

* Fix migration

src-ui/src/app/data/workflow-action.ts

@@ -7,6 +7,7 @@ export enum WorkflowActionType {
   Webhook = 4,
   PasswordRemoval = 5,
   MoveToTrash = 6,
+  RemoteOcr = 7,
 }
 
 export interface WorkflowActionEmail extends ObjectWithId {