The download function is now overloaded and additionlly supports a
dict with file paths as values, in addition to the present string as
file path. The data is forwarded as dict of the same structure in the
first case.
Load settings from .toml files, .env and environment variables. Also ensures a ROOT_PATH environment variable is
set. If ROOT_PATH is not set and no root_path argument is passed, the current working directory is used as root.
Settings paths can be a single .toml file, a folder containing .toml files or a list of .toml files and folders.
If a folder is passed, all .toml files in the folder are loaded. If settings path is None, only .env and
environment variables are loaded. If settings_path are relative paths, they are joined with the root_path argument.
The tests don't work yet since the webserver has to run in a thread and
the traces don't get exported from the thread with local json exporting.
However, with an export to an external server this should still work.
WIP
