This updates the logic to not emit any console messags unless the environment variable `DUPLICATI_PRELOAD_SETTINGS_DEBUG=1` is set.
This changes the paths used on MacOS to not use the `/usr/share/Duplicati` folder which is write procted, but rather the `/usr/share/local/Duplicati`.
Added the `/usr/share/local/Duplicati` path for Linux as well.
Added detection for portable mode and only using relative/specific paths for preload in portable mode.
Added support for also probing `%LOCALAPPDATA% folder, which is where other settings are loaded, to allow "all settings in one place". Note that it is possible to use the preload to choose a different folder for anything but the `preload.json` file.
Added an option for specifying `DUPLICATI_PRELOAD_SETTINGS=!<path to file>`, where the leading `!` signifies that **only** that file is loaded and all other locations are ignored.