feat: shared listen functionality (PL-1342)

[zhihil]

Fixes or implements PL-1342

Brief description. What is this change?

Adds shared functionality that is used by all listen steps. This includes:

1. No match
2. No reply
3. Buttons
4. Listen for other triggers

Implementation details. How do you make this change?

Added shared utility functions to be used across different step handlers.

Integrate those step handlers in Choice V2 and Capture V3.

Setup information

Deployment Notes

Related PRs

• https://github.com/voiceflow/XXXXXXXXX/pull/123

Checklist

• [ ] Breaking changes have been communicated, including:
  • New required environment variables
  • Renaming of interfaces (API routes, request/response interface, etc)
• [ ] New environment variables have been deployed
• [ ] Appropriate tests have been written
  • Bug fixes are accompanied by an updated or new test
  • New features are accompanied by a new test