Notification endpoints (#3096)

* Initial notification schema

* Add: notification event and settings schema

* Add: NotificationController

* Update bundled spec

* Fix: `operationId` typos

* Fix: library response to be arroy of objects

* Fix: notification ID is not uuid

* Add: `nullable` notification creation parameters

* Nullable libraryId schema

* Remove: `id` from Notification requestBody

* Fix: `allOf` for `libraryItemSequence`

* Fix: required `id` in wrong body

* Fix: libraryItem typos

* Update: bundled spec

docs/controllers/LibraryController.yaml

@@ -111,9 +111,12 @@ paths:
           content:
             application/json:
               schema:
-                type: array
-                items:
-                  $ref: '../objects/Library.yaml#/components/schemas/library'
+                type: object
+                properties:
+                  libraries:
+                    type: array
+                    items:
+                      $ref: '../objects/Library.yaml#/components/schemas/library'
     post:
       operationId: createLibrary
       summary: Create a new library on server