QML: Rename `Scripts` module

[LeonMatthesKDAB]

The Scripts name is somewhat nondescript.

We should rename this to Knut, or com.kdab.knut before releasing v1.0.
The exact name still needs to be chosen.

[narnaud]

I would prefer import Knut

Also take this opportunity to remove all version numbers in QML/JS
That's the new way to do things in Qt, so just import Knut, not import Knut 1.0