feat: use prompt to setup config.json and root data folder in init command

[JinIgarashi]

closes #97

default variables

• root_data_folder: ~/cbsurge
• account_name: undpgeohub
• container_name: stacdata
• file_share_name: cbrapida

config file is stored at ~/.cbsurge/config.json.

In Session class constructor, it reads config from ~/.cbsurge/config.json.

prompt

• when first time run

pipenv run rapida init 
Welcome to rapida CLI tool!
Would you like to setup rapida tool? [y/N]: y
Authentication successful. We need more information to setup from you.
Please enter project root folder to store all data. Enter to skip if use default value [~/cbsurge]: 
The project root folder was created at /root/cbsurge
Please enter account name for UNDP Azure. Enter to skip if use default value [undpgeohub]: 
account name: undpgeohub
Please enter container name for UNDP Azure. Enter to skip if use default value [stacdata]: 
container name: stacdata
Please enter share name for UNDP Azure. Enter to skip if use default value [cbrapida]: 
file share name: cbrapida
Setting up was successfully done!

• if setup has been done already

pipenv run rapida init 
Welcome to rapida CLI tool!
Your setup has already been done. Would you like to do setup again? [y/N]: n
Aborted!

or if y, continue setting up again