Add drag drop to controlnet, and nav update

[cbh123]

New in this PR

• drag and drop to controlnet page
• upload controlnet image to supabase
• pill navigation
• little bug fixes

https://github.com/replicate/zoo/assets/14149230/f7932d64-6a95-4631-a245-802bb0daddae

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Name	Status	Preview	Comments	Updated (UTC)
zoo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 30, 2023 7:18pm

[cbh123]

@zeke thanks 😎. I added a quick helper for now. The gray header description (ControlNet models take...) and the "Click to upload your own" will go after first submission. Definitely needs explanation for how ControlNet works, but it's a start

[cbh123]

Adding a link to @fofr's video on controlnet pre-processors if you click the header or the "learn more" under models.

https://www.youtube.com/watch?v=GVCZHCLWON8

[cbh123]

Bit nicer uploader too: