CLI: move back to argparse

[jaagut]

This pull request includes several changes to improve the ddlitlab2024 project. The most significant updates involve replacing the Tap library with argparse for command-line argument parsing, updating the database path handling to use pathlib.Path, and refactoring the main function to support new subcommands.

Command-line argument parsing improvements:

• Replaced Tap with argparse for more flexible and standard command-line argument parsing in ddlitlab2024/dataset/cli.py. [1] [2]

Database path handling:

• Changed the database path handling from os.path to pathlib.Path in ddlitlab2024/__init__.py and ddlitlab2024/dataset/db.py. [1] [2]

Main function refactoring:

• Updated the main function in ddlitlab2024/dataset/main.py to handle new subcommands and improve session management.

Additional imports:

• Added necessary imports in various files to support the new changes. [1] [2] [3]