[ext.pages] Compatibility patch for ext.bridge

[krittick]

Summary

This adds compatibility for ext.pages when used with ext.bridge by allowing a BridgeContext object to be passed instead of an Interaction in Paginator.respond().
If a BridgeContext object is passed, Paginator.respond() uses the ext.bridge methods to send the paginated message instead of the Interaction methods.

Due to BridgeContext.respond() not recognizing the ephemeral keyword, paginators passing a BridgeContext object cannot be ephemeral and that parameter will be ignored.

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, typehinting, examples, ...)