update swiftusd, make it swifty™.

Signed-off-by: furby™ <[email protected]>

Fix threading issues, create scene based app contexts.

Release Kraken v1.0.9.

Add gif.

Bump SwiftUSD.

Bump SwiftUSD, ensure working order.

Add OIIO & OCIO, fix bundle name for assets.

Bump to next SwiftUSD evolution.

* SwiftUSD v23.11.21 grants us USD with iOS support.

Update to latest SwiftUSD, cleanup code.

- Release Kraken v1.0.3.

Hello Metaverse.