Support displayName in Scala functional components

[rpiaggio]

• ScalaFnComponent and ScalaForwardRef now support .withDisplayName(name). Must be called first (before hooks/render*/withChildren*).

Example:

  ScalaFnComponent.withDisplayName("MyComponent")
    .withHooks[Props]
    .useState(0)
    .render((_, s) => s.value.toString)

I disabled Mima checks temporarily since this is binary incompatible (it is source compatible though). This implies we have to step up to 2.2.0. We have to reenable Mima tests after 2.2.0 release. This will go into a 3.0.0 release, together with React 18 support.

Thanks to @hugo-vrijswijk for the idea of using sourcecode.FullName for the default names.

[hugo-vrijswijk]

What happens when not setting displayName? Does it also set the JS facade to ""? And if so, is this different behaviour than leaving it unset?

[rpiaggio]

If not set, it is taken from an implicit sourcecode.FullName.

[toddburnside]

Maybe something about the default value?

[rpiaggio]

Good idea 👍

[toddburnside]

A lot of work to weave the name through everything, but I don't see a simpler alternative. LGTM.

[rpiaggio]

Since this implementation breaks binary compatibility, it would actually imply a major version bump (ie: 3.0.0).

Seems overkill just for this change, so I'm going to merge this change to our React 18 branch and release this feature there.