assets are stale

[neurlang]

I don't think the assets (icons) compile any more. No code generation occurs at compile time. TODO: Fix by using embed fs:

//go:embed assetdir/*.html
//go:embed assetdir/*.png
var content embed.FS

the data bytes can then be read using

data, _ := content.ReadFile(name)

convert callers, hardcode string resource names instead of public funcs