Support for Multi-Select Voting and Poll Closing in Polls Extension

We would like to request enhancements to the Polls extension to support more advanced polling use cases commonly required in production applications.

Feature Requests:

1. Multi-Select Voting

   • Allow users to select and vote for multiple options within a single poll.

   • API should support submitting multiple option IDs in a single vote request.

   • Results should reflect aggregated multi-option selections per user.

2. Poll Closing / Disabling Voting

   • Ability to close a poll manually or automatically (e.g., after a time limit or based on a condition).

   • Introduce a status field (e.g., open, closed) accessible via API.

   • Prevent further votes once the poll is closed.

   • UI support to render closed polls as non-interactive.