Support additional formats

[janniks]

• Add more filter options (manual mime types) #26

• Add 3d rendering #27 moved out

[chresko]

Bumping this up to High priority since we've discussed it since the MVP and there's been frequent asks/demand to support!

[janniks]

Thanks, custom mime type filtering works now. I'll revisit 3d rendering after brc20 additions.

[smcclellan]

Bumping 3D rendering out of this ticket due to the priority discrepancy. That ticket will still be in our backlog.