Integrate PySide6-project tool

kleint added a tool to PySide that among other things runs uic on designer forms and rcc on resource files of a python project, so the user does not have to do this steps manually for each of these files.

Detect the presence of this tool and integrate it as a build step for python projects inside Qt Creator. This build step than gets executed before running a python script to ensure all designer and resource dependencies are up to date.