feat: Add read-only collections (#1991)

closes #1017

app/models/Collection.js

@@ -15,7 +15,7 @@ export default class Collection extends BaseModel {
   description: string;
   icon: string;
   color: string;
-  private: boolean;
+  permission: "read" | "read_write" | void;
   sharing: boolean;
   index: string;
   documents: NavigationNode[];
@@ -25,11 +25,6 @@ export default class Collection extends BaseModel {
   sort: { field: string, direction: "asc" | "desc" };
   url: string;
 
-  @computed
-  get isPrivate(): boolean {
-    return this.private;
-  }
-
   @computed
   get isEmpty(): boolean {
     return this.documents.length === 0;
@@ -121,7 +116,7 @@ export default class Collection extends BaseModel {
       "description",
       "sharing",
       "icon",
-      "private",
+      "permission",
       "sort",
       "index",
     ]);