* Migrating reference settings to mongo and exposing them through code mirror context
* removing undefined optional for reference manager type settings
* allowing partial updates to user settings objects, and remove repeated cypress intercepts
* Zod schema parsing for user reference manager settings
* Splitting ref provider mongoose schema into const
* Persisting local storage reference settings to mongo and deleting from local
* Enforcing ref provider group id to always be type string
* Fixing test and format errors
* Migrated flag for settings to only migrate once
* fixing cypress tests adding migrated flag
* persisting local storage to allow for easy rollback
GitOrigin-RevId: f59522bdee6f0e56efb7d98b9d9373a743619ec8