Module registry completions not offered when '/' is typed

[levimatheri]

Bicep version 0.30.23

Describe the bug When typing a '/' in the registry path, completion is no longer provided (see below) I think it makes sense to make this work similarly to how resource namespace completions work.

https://github.com/user-attachments/assets/51ceb7a4-8582-4bb5-b92f-8eb62c522a1e

cc @StephenWeatherford