Add support for accordion-flush and accordion always open

[JimiRecard]

This addresses #60, #61 and #62. Tests should work now.

The term "always open" sounds misleading to me, but it's what the folks at Bootstrap use. We could change this to something more descriptive if judged necessary.

I'm not sure about the way I pulled classes from bootstrap.py. It feels awkward. I was inheriting from the original classes before and adding just what I needed, but it somehow felt worse. Any suggestions?

[JimiRecard]

And as I said that, most of the tests failed.

I don't know what went wrong. The only test that failed locally for me was test_select_prepended, which is not where I'm tweaking. I'll investigate these failures. Meanwhile, I'll close #61 and #62

[JimiRecard]

Well, tests passed. Let me know what you think of the new tests and the way I used the classes at bootstrap5.py. Those are the points I'm most unsure about.

Cheers!

[smithdc1]

This looks good, thank you. 👍

Although I've not yet sat down with this properly I've left a few initial comments.

Thanks again. :-)

[smithdc1]

Thanks for the updates. Would you like to add a small note to the readme to document the new feature in this template pack? Happy to help, just let me know.

[JimiRecard]

Would you like to add a small note to the readme to document the new feature in this template pack?

Of course! I'll follow the floating labels note style

[smithdc1]

Thanks for all your efforts here 🥇