Add document unsubscribe link in email footer (#5762)

shared/i18n/locales/en_US/translation.json

@@ -345,6 +345,7 @@
   "Indent": "Indent",
   "Outdent": "Outdent",
   "Could not import file": "Could not import file",
+  "Unsubscribed from document": "Unsubscribed from document",
   "Account": "Account",
   "API Tokens": "API Tokens",
   "Details": "Details",

shared/types.ts

@@ -219,6 +219,10 @@ export enum UnfurlType {
   Document = "document",
 }
 
+export enum QueryNotices {
+  UnsubscribeDocument = "unsubscribe-document",
+}
+
 export type OEmbedType = "photo" | "video" | "rich";
 
 export type Unfurl<T = OEmbedType> = {