Allow view of the help and example menus outside of a repo

To reproduce:
```bash
cd /tmp
python3 -m venv venv
. venv/bin/activate
pip install base-version-checker

version-checker -h
CRITICAL:(version_checker):This utility must be run from the root of a git repository!
version-checker -e
CRITICAL:(version_checker):This utility must be run from the root of a git repository!
```
If outside of a git repository, you cannot see the help or example switches.
Maybe we should auto print the help menu prior to the CRITICAL log?

Start by running the reported commands outside a Git repository and locate the command handling for -h and -e, along with the repository-root check. Done means both switches display their menus without requiring the current directory to be a Git repository, while normal repository-dependent behavior remains protected by the check.

Written by the indexing model from the issue text.