Bring back the prefix option

[caraar12345]

Hello!

It looks like before Browser Mod 2, eaed9cd allowed for the browser_mod YAML config to have a prefix setting so all Browser Mod entities could start browser_mod_ for example. However, it seems that this is no longer a thing in BM2.

Was this intentional or just something that didn't make it into the rewrite?

It'd be awesome if this could be brought back. For reference, I just found a lot of Screen lights in my Apple Home that I've filtered out with the entity glob light.*_screen, but being able to filter all Browser Mod entities with *.browser_mod_* would be so much better. I could also then filter all the BM entities from recorder!

Thank you!