update argsparser

[caelean]

Update the argparser to no longer require a path. Instead, check for the presence of a modguard.yml in the cwd.
Pass "." as the default path to check/show/init calls outside of the cli. Updates tests to match and run on 'docs'

• passing test, dev-reqs
• updated readme
• add additional modguard init stuff
• updated readme to show module.yml syntax
• more tweaks
• modguard ignore
• last tweaks
• cap
• remove interface ref
• fix up python quotes
• suggested docs changes
• update back to strict mode, pyright ignores, venv ignore, test venv activate
• updated cli interface
• check local dir
• update docstring