Bugfix/pltshow

[c-randall]

Description

This PR updates the README/docs to add Coulombic efficiency to the model description. It also fixes a "bug" reported in the old ROVI-org repo where plt.show() in the solutions class was not set up for blocking when running scripts outside of interactive environments.

Fixes Issue #12.

Type of change

• New feature (non-breaking change which adds functionality)
• Optimization (back-end change that improves speed/readability/etc.)
• Bug fix (non-breaking change which fixes an issue)

Key checklist:

• No style issues: $ nox -s linter [-- format]
• Code is free of misspellings: $ nox -s codespell [-- write]
• All tests pass: $ nox -s tests
• Badges are updated: $ nox -s badges

Further checks:

• The documentation builds: $ nox -s docs.
• Code is commented, particularly in hard-to-understand areas.
• Tests are added that prove fix is effective or that feature works.