Migrate from qmake to Qbs (Qt Build Suite)

Qt Build Suite (Qbs) is a tool that helps simplify the build process for developing projects across multiple platforms. Qbs can be used for any software project, whether it is written in Qt or not.

Qbs is an all-in-one tool that generates a build graph from a high-level project description (like qmake or cmake) and additionally undertakes the task of executing the commands in the low-level build graph (like make).

I propose to make it in separate branch.