fix: MM remote improvements

[JamesMConroy]

Proposed change

Update the MM remote so it supports

• scheduled messages
• output_to_rooms
• output_to_users
• direct messages

Types of changes

What types of changes is this pull request introducing to flottbot?

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

You can fill this out after creating your PR. Put an x in the boxes that apply

• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)