Add list selector to "New ways to ignore people" lab option

### Your use case

#### What would you like to do?

Add some type of list selector to new ways to ignore people lab option.

#### Why would you like to do it?

This would improve the user experiece of this lab option as it would allow you to easily select a list without having to fetch its room ID or alias akin to how adding rooms to spaces works.

#### How would you like to achieve it?

Using the MSC3784 room type to filter out all policy lists the account is joined to and present them in a list the way addding rooms to spaces works today. Ofc this would need a dont see your room show all button due to the "legacy" problem that the MSC refers to.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_