Prompt management

[gokula-krishna-dev]

Is your feature request related to a problem? Please describe.
Yes, I'm trying to save and retrieve prompts from GCP.

Describe the solution you'd like
I want perform the following action via SDK

• Create, update, delete and fetch prompts with version

Describe alternatives you've considered
None

Additional context
The feature seems to be available on Python SDK but not on JS - https://cloud.google.com/python/docs/reference/vertexai/latest/.