feat: add auto-create collection option to mock server creation (hoppscotch#5637)

Co-authored-by: Anwarul Islam <[email protected]>

Author: mirarifhasan

packages/hoppscotch-backend/src/errors.ts

@@ -892,6 +892,13 @@ export const MOCK_SERVER_NOT_FOUND = 'mock_server/not_found';
  */
 export const MOCK_SERVER_INVALID_COLLECTION = 'mock_server/invalid_collection';
 
+/**
+ * Mock server collection creation failed
+ * (MockServerService)
+ */
+export const MOCK_SERVER_COLLECTION_CREATION_FAILED =
+  'mock_server/collection_creation_failed';
+
 /**
  * Mock server already exists for this collection
  * (MockServerService)