Wildcard tab JS rework

[akx]

This PR:

• adds eslint + prettier for enforcing style and quality in the JS code too
• reworks the wildcard manager tab's logic
  • Code is now 99% in a single singleton SDDP class that's just initialized with a couple of external things
  • Most communication is handled with an inbox and outbox field instead of really dealing that much with Gradio callbacks
• modernizes and cleans up the treeview component; I assume SD users don't use legacy browsers

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Might want to give this a more thorough testing in case I've missed something :)

[adieyal]

Everything works except:

1. I can't edit files
2. The dropdown on collections is hard to see as it doesn't have a border. I don't recall that being the case before but I can't be sure.

[akx]

Thanks for verifying. I'll try and fix those tomorrow :)