Initial starting, Sessions & whoami cmd for cbrain-cli

[axif0]

pip installation:

python3 -m venv venv
source venv/bin/activate
pip install -e .

Shell integration should work just with ./cbrain

I tried not to use install any library. Just using built-in library argparse and urllib.
Also only focus on just user details only,
/users/{id}
/session as POST, GET, DELETE.

Followed the guideline->

• CBRAIN CLI cbrain#1507

[prioux]

Okay, it's a start.

[prioux]

Try to see if you could use cbrain_api from https://github.com/aces/cbrain-python-client instead.