Implement Modal responses

[surajkumar]

As a user I want to...

be able to respond to events with modals

So that...

I can send users buttons and form prompts to receive data and control flow.

Context

Discord provides a rich set of APIs for interacting with invites in a discord server. We should implement all these endpoints. This ticket covers only implementing forms and buttons.

Acceptance Criteria

GIVEN a user wants to send back options or forms
THEN the specified action should be sent to the caller