Import semantic-ui

[armanbilge]

Resuscitates #6.

[armanbilge]

So, the situation with js.| which becomes a true union type in Scala 3 is really really bad for some reason.

For example this code

as.toJs.foreach(v => p.as = v)
                     ~~~~~~~~
Found:    (v : Object)
Required: scala.scalajs.js.UndefOr[react.semanticui.AsT]

But, if I explicitly annotate (v: js.UndefOr[AsT]) => ... then it compiles.

[armanbilge]

Waiting to see what happens in:

• Type inference difficulties with UndefOr[A | B] scala/scala3#14770