[Feature] add basic CLI commands

[vpchung]

Describe The Problem To Be Solved

Port over the common challengeutils commands and functions, e.g.

• annotate-submission
• create-portal-challenge
• change-status
• send-email
• delete-submission

etc.

(optional) Suggest a Solution

• Some refactoring will be needed
• Utilize Typer for the CLI (over argparse)