web build

[bwhitman]

I was happy to see LVGL run an SDL-backed micropython demo fully on the web, it's quite nice:

https://sim.lvgl.io/v9.0/micropython/ports/webassembly/index.html

This can basically be Tulip on the web if we add in AMY-web. There's probably some thorny thing I'm missing but it's worth a shot. It would be great to get the friction for new users down as much as possible.

I think a good TODO is to try to port that demo to Tulip and then add in AMY. Later we can worry about keyboard, MIDI, filesystem access, etc.

The code seems to be here: https://github.com/lvgl/lv_micropython/tree/lvgl_javascript_v8#javascript-port

[bwhitman]

Moving to #327 in roadmap