Filtering pulls by branch

[oleh-kolinko]

Is your feature request related to a problem? Please describe.
The problem in mono repos with a lot of activity and pulls, there is very limited ways to filter pulls with GitHub - Teams integration

Describe the solution you'd like

I would like filtering by branch name for pulls. Similar functionality already exists for filtering commits by branch, so solution could be:

@github subscribe org/repo pulls:myBranch

OR similarly to filtering by label:

@github subscribe org/repo pulls +branch:myBranch

Important to have an option to use wild cards e.g.: feature/*, bugfix/*

Describe alternatives you've considered
Alternative is to use filtering by labels. But it is cumbersome for you to set up a separate workflow to auto-label pulls first, and only after that you can filter by label.

Additional context
It would be very useful for a big mono repo where a lot of pulls are happening and you only want to focus on specific branches.

It would also be useful if you want to group different types of branches (e.g. feature/*, bugfix/*, development) to a specific channel in Teams