Deslop feature to allow for blocking known slop channels and sharing blocklists

### Describe your suggested feature Looking at closed feature requests, I realise this could technically be a duplicate. If so, fair call but hear me out for a sec. Now with prevalence of AI slop, perhaps it's time to reconsider a channel block feature? I'd love a feature that allowed me to import other peoples channel blocklists too, merging with my own to reshare with friends dealing with same issue. Is there a thing like ublock for slop youtube channels? If so, hook us up! ### Other details I think the technical capabilities could look like: - Manage blocklist(s) functionality - local list clear all or remove selected channel(s) & subscribe to external url blocklists - Add channel to blocklist (from channel screen or other channel-specific interation menu) - Whatever screen show lists of videos: ignore blocked channels. If that means we see nothing in "What's Trending" or whatever, because it's all slop, so be it. ### Acknowledgements - [x] I have searched the existing issues and this is a new ticket, **NOT** a duplicate or related to another open issue. - [x] I have written a short but informative title. - [x] I will fill out all of the requested information in this form.