This issue is related with https://jira.mongodb.org/browse/MONGOSH-1070

 
Describe the bug
Now the app is creating the directory ~/.mongodb instead of use ${XDG_CACHE_HOME}/mongodb/ or ${XDG_DATA_HOME}/mongodb/.
 

To Reproduce
Steps to reproduce the behavior:

1. Open app

Expected behavior
That the app follows the XDG Base Directory Specification
 

Additional context
As side note in Linux $XDG_CACHE_HOME or $XDG_DATA_HOME may not be declared, in this case must fallback to _/.cache and /.local respectively.

For example in BASH (for $XDG_CACHE_HOME, $XDG_DATA_HOME is the same way:

MONGODB_DIR=${XDG_CACHE_HOME:-~/.cache}/mongodb

Or in Python:

mongodb_dir = os.path.join(os.environ.get('XDG_CACHE_HOME', os.path.join(os.path.expanduser('~'), '.cache')), 'mongodb')