Websocket Support (#937)

* Atom / RSS meta link

* Spike

* Feeling good about this spike now

* Remove document.collection

* Remove koa.ctx from all presenters to make them portable outside requests

* Remove full serialized model from events
Move events.add to controllers for now, will eventually be in commands

* collections.create event
parentDocument -> parentDocumentId

* Fix up deprecated tests

* Fixed: Doc creation

* documents.move

* Handle collection deleted

* 💚

* Authorize room join requests

* Move starred data structure
Account for documents with no context on sockets

* Add socket.io-redis

* Add WEBSOCKETS_ENABLED env variable to disable websockets entirely for self hosted
New installations will default to true, existing installations to false

* 💚 No need for promise response here

* Reload notice

app/types/index.js

@@ -6,6 +6,11 @@ export type Toast = {
   createdAt: string,
   message: string,
   type: 'warning' | 'error' | 'info' | 'success',
+  timeout?: number,
+  action?: {
+    text: string,
+    onClick: () => void,
+  },
 };
 
 export type FetchOptions = {