Add the ability to Hide models

[JustMaier]

Give users the ability to hide models from the main feed. This would allow them to kind of manually curate their main page. We could also then use the data to even offer to auto curate for them.

[JustMaier]

We've decided to currently do this at the user level.

Here's what it looks like:

[Seantourage]

Thanks so much!