The first steps towards WASM module integration

[TheLostLambda]

Hello all! This is a grafting of some of the WASM module loader into mosaic!

There is a lot still to do, but this is the first step!

From here, I'll be adding

• A way to load "tiles" from a layout file
• A way to actually render a plugin to a pane
• Working on parsing input into a struct usable by the plugin system

[TheLostLambda]

Also, it's a bit silly to have put those tasks here, check out #74 for an actual tracking issue!