Option to hide public room

### Your use case

#### What would you like to do?

I wish to hide public room searchable by default. It would be good to have unhide option in settings.

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

Hmm, most of the public server have 18+ contents and it's not good things for kids. So, we can not use it as our main family messaging app. if it hide by default then it would be uneasy to find that things for kids

#### How would you like to achieve it?
To hide the room search by default. And beside that it can search by ID instead of name then it will be good for privacy for kids.

### Have you considered any alternatives?

Instead of name search it can only be search by ID.

### Additional context

_No response_