HuntersKeepers needs a Dark Mode

[ChaelCodes]

Describe the bug
HuntersKeepers continues to blind unexpecting stream viewers. Apply a dark mode to the site.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
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[ChaelCodes]

This looks very painful.
https://buefy.org/documentation/customization/
https://bulma.io/2019/10/15/light-dark-colors/#scheme-variables-for-dark-mode
buefy/buefy#1861
https://mybyways.com/blog/dark-mode-with-prefers-color-sheme-media-query
https://css-tricks.com/dark-modes-with-css/
Permanent dark mode is fine, but I think we stripped out our sass plugin.

[connorshea]

FWIW I implemented this with Bulma on vglist by using Bulma's css variables branch https://github.com/jgthms/bulma/tree/css-variables-with-fallback

connorshea/vglist#1501

Not sure how applicable that is for Buefy, though.

[ChaelCodes]

I'm okay with this being dark mode only, and Buefy does support css variables! Buefy will use custom Bulma values if they're set in application.sass and buefy.css is not imported. That means application.css needs to be converted into an application.sass file though. I like the colors and styles you used. I definitely want to borrow that.

Why did you need the theme in individual components? It seems like the application.scss in vglist already has a media query. Also, it looks like Bulma 0.8.0 supported css vars. Why did you need the fallback branch?