Issue
When adding application specific python paths for example we need to replace the "" with "/"
Motivation
The .toml files support relative paths with the format approach : {AVALON_CORE}
Extending the support to normalized path seems logic .
Proposal
Together with recreating the absolute convert the path to the OS normalized path.
# pseudo code
absolute_path =string.format(os.environ[**keys])
os_supported_path = os.path.normpath(absolute_path)