Add y/n option to missing libraries

CLI Script

cwms-cli

Feature Proposal

If a user does not have a required library, you will see this due to the @requires decorator.

cwms-cli blob list 

Error: Missing module(s):
- `cwms` (install: `cwms-python`) — CWMS REST API Python client [docs](https://github.com/HydrologicEngineeringCenter/cwms-python)

Install missing packages:
    pip install cwms-python

Should the CLI prompt the user y/n to auto install the library?

I.e. something like

Would you like to install missing packages?
    pip install cwms-python

> [Y]es/[N]o: N

Bonus, we can use sys.executable to install it so that it will also respect the current python env.

Thinking we can build this into the @requires decorator

Care: If a headless job runs (CWMS Batch) we do not want any prompts to hang the job. They should instead throw the normal error. We want to make sure interactive prompts are reserved for human sessions.

Start at the @requires decorator used by cwms-cli and trace how missing libraries currently produce the error. Check how the CLI distinguishes interactive human sessions from headless CWMS Batch jobs, and review sys.executable for installation behavior. Done means interactive users can accept or decline installation while headless jobs retain the normal error.