Create-intro-cards

- Mock the return value of `datetime.datetime.now()` in the `TestMakePDF` test suite
- Insert backticks and replace a few words in docstrings
- Rename a few internal variables and a test
- Remove trailing commas in README code snippets

**Full Changelog**: https://github.com/robertfmath/create-intro-cards/compare/v1.0.4...v1.0.5

Update filename of logo and revise `example_people_data.png`

All references to "Create-Intro-Cards" were replaced with "create-intro-cards" for the sake of uniformity with the PyPI package name

- Remove `plt.close(fig="all")` in favor of closing each fig individually with `plt.close(fig)`. This avoids a memory warning when many figures are created.
- Docstrings: adjust backticks, add additional func field list, make two of them raw strings to avoid `\` escape warning
- Add timing estimate to README.md
- Adjust wording in pyproject.toml

Includes rewordings in README and docstrings, an update to the project description in `pyproject.toml`, and changing of badge colors in README