Added the new MAX_DISTANCE parameter to the LIDW_LAPSE spatial interpolation and the new SMET_VERSIONING options

The CMakeLists.txt now (almost) supports both qt5 and qt6 (for qt6, qt5_add_translation must be replaced by the proper one). The compilation instructions were not up to date, they have been updated.

It has also been slightly renamed...

The search paths for the xml files has been improved in order to handle the case of symlinks to the binary

(so those who want to skip installing qt5-tools can compile without!)

... but the test fails.

I did not manage to have Inishell opening up in German, but at least the translation files can be generated and don't stop the compilation

Also the first effort to address issue 884

Trying to get nicer looking paths in the workflow panel, as shown above the applications or simulations