Unify API perm endpoint to set_permissions, initial frontend support for doc sharing

src-ui/src/app/data/object-with-permissions.ts

@@ -0,0 +1,8 @@
+import { ObjectWithId } from './object-with-id'
+import { PaperlessUser } from './paperless-user'
+
+export interface ObjectWithPermissions extends ObjectWithId {
+  user?: PaperlessUser
+
+  permissions?: Array<[number, string]>
+}