rename classes and drop ksane prefix
using ksane namespace plus class prefix is superfluous
was pointed out in !1 (merged) Skanpage adaption is at https://invent.kde.org/astippich/skanpage/-/commits/ksanecore
using ksane namespace plus class prefix is superfluous
was pointed out in !1 (merged) Skanpage adaption is at https://invent.kde.org/astippich/skanpage/-/commits/ksanecore