Add basic dark theme

[babbitt]

Howdy! Heard about mailta.pe through prose.io and have been listening ever since.
Not the worlds greatest contribution but thought I would throw in a quick dark mode theme. I'm not sure it's 100% bullet proof as I was hunting down classes due to the nature of the project layout but it seems to work well visually confirming.

Light	Dark

I also added some accessibility changes in which occur on both versions of the site:

• Added a stroke behind the white text on the episode page so that it's easier read on images with lighter backgrounds
• Darker text on Vibrant backgrounds since white on bright yellow can be hard to read

Of course feedback on any of this or changes is always welcome.

Thanks for putting together high quality tapes every week!

[ImaCrea]

Hi @babbitt thanks for this awesome contribution ! And sorry for the delay of my answer 😅

As I'm in the process of rewriting all to switch from Jekyll to Astro, I'm not sure how this is gonna work out. I'm planning also to switch from Bootstrap to Tailwind on the CSS side. So maybe let's wait for it to be in production (expect 1-2 months) and then we see how this PR needs to be updated eventually. 🤔

Cool for you?

A thousands thanks again for your contribution 💫 This is extremely cool.