Add Intellisense Tooltips to external services

[emclaug2]

Describe the desired behavior

Whenever users need to implement their IBluiRegisterUIService or IBluiAuthUIService it would be useful to have intellisense tooltips explaining for each method:

1. What each function does
2. When each function is called
3. Function params
4. The return type & implications

Describe the current behavior

None of this exists; users have to refer to the source code and documentation.

Is this request related to a current issue?

No

Additional Context

Discovered when validateUserRegistrationRequest was invoked in an external project & couldn't figure out for hours why it skipped the subsequent password & first/last name steps.