Main entry point buggy if no command line arguments are supplied

[nicc777]

Describe the bug

When run without any command line arguments the scripts exists with an error

To Reproduce

Docker example:

$ ocker run --rm -e "DEBUG=0" -it \
  -v $PWD/templates/utils/factory:/tmp/src \
  -v $PWD/templates/utils/extension-definitions:/tmp/data \
  ghcr.io/nicc777/py-animus:latest
Traceback (most recent call last):
  File "/usr/local/bin/animus", line 5, in <module>
    from py_animus.py_animus import main
  File "/usr/local/lib/python3.10/site-packages/py_animus/py_animus.py", line 62, in <module>
    def main(logger=get_logger(), command: str=sys.argv[1], cli_args: list=sys.argv[2:]):
IndexError: list index out of range

Command example:

$ venv/bin/animus 
Traceback (most recent call last):
  File "/media/nicc777/data/nicc777/git/Personal/GitHub/py-animus-extensions/venv/bin/animus", line 5, in <module>
    from py_animus.py_animus import main
  File "/media/nicc777/data/nicc777/git/Personal/GitHub/py-animus-extensions/venv/lib/python3.10/site-packages/py_animus/py_animus.py", line 62, in <module>
    def main(logger=get_logger(), command: str=sys.argv[1], cli_args: list=sys.argv[2:]):
IndexError: list index out of range

Expected behavior

Print usage instructions

Development Environment (please complete the following information):

• OS: Any
• Python Version" 3.10.6
• py-animus version: 1.0.2

Additional context

n/a