feat: Allow viewers to be upgraded to editors on individual collections (#4023)

* Improve types

* More types, fix default permission for viewers added to collection

* fix change of default role for CollectionGroup

* Restore policy

* test

* tests

server/presenters/collectionGroupMembership.ts

@@ -1,10 +1,11 @@
+import { CollectionPermission } from "@shared/types";
 import { CollectionGroup } from "@server/models";
 
 type Membership = {
   id: string;
   groupId: string;
   collectionId: string;
-  permission: string;
+  permission: CollectionPermission;
 };
 
 export default (membership: CollectionGroup): Membership => {

server/presenters/membership.ts

@@ -1,10 +1,11 @@
+import { CollectionPermission } from "@shared/types";
 import { CollectionUser } from "@server/models";
 
 type Membership = {
   id: string;
   userId: string;
   collectionId: string;
-  permission: string;
+  permission: CollectionPermission;
 };
 
 export default (membership: CollectionUser): Membership => {