feat: add Cave Story channel

[omgitsraven]

The indie classic! A few points:

• This is my first time writing React, so please let me know if I've made any big goofs.
• Channel number is picked after the '290 Counter', an item from the game.
• The PreloadHider section is there because sometimes I would see characters popping in halfway across the screen, even after that same character had already appeared previously. Adding this section seems to have mitigated it, although it's rare enough that I might just not have seen it happen again yet? Open to better suggestions, though also, it doesn't seem to hurt anything to have it present.
• Donation values under $100 correspond to one of 4 enemies based on their size; anything above that randomly picks one of five main characters (one of whom has an alternate variation on a 1/3 chance). I'm very open to suggestions about tuning those cutoff values (or replacing them with all donation size based, or all random?)

Description

Adds a new channel based on the original version of Cave Story.

A scene is shown of two characters standing on a ledge watching the night sky. Clouds scroll by in parallax layers, and the characters animate slightly (breathing, blinking) making it interesting even with no donations occurring. When a donation occurs, another character from the game (one of several) will fly past in the background, with the donation amount floating above their head.

https://github.com/GamesDoneQuick/gdq-break-channels/assets/8540042/359e3872-5473-4ccc-8f6e-22fc23d34e8c

Checklist:

• [x] I have read and followed the requirements in the Contributing document.
• [x] My code has been tested.
• [x] My commit title follows Conventional Commits formatting.
• [x] All the code is my own, or is code I have the rights to, and is being made available under the Apache License Version 2.0.

• [x] My channel contains no first-party Nintendo assets.
• [x] I understand that GamesDoneQuick may reject, make changes to, or choose not to show this channel on broadcast, and that discussion or merging does not guarantee the work will be used.

[omgitsraven]

Is failing CI a problem, if it seemed to work fine in the browser? I never had any problems doing npm run preview so I assumed I was fine; if this is something I need to fix, what are the instructions for testing the build process locally so I can find out if my fixes are working without having to push commits all the way to github?

[VodBox]

If you run npm run build locally, you'll be able to see the same errors there

[omgitsraven]

Thank you! Hopefully this commit should fix it. Maybe the bit about npm run build should go in the contribution guide?

[omgitsraven]

also, I'm not totally familiar with GitHub's reviewing workflow, so let me know if there's any steps I'm missing on my end, sorry about that.

[omgitsraven]

The vars have been replaced by lets.

Sorry about the characters staying stuck on screen; I'm not sure how I missed that! Ironically, the animation actually DID take the characters all the way offscreen, but the lack of an animation-fill-mode was causing them to snap back to the left edge as soon as the animation finished. That's fixed now.

Thank you for being understanding about some of the less-proper bits of the program; this is still my only experience with React, and there's definitely aspects of it I don't totally grasp still.

I've also applied the requested visual changes to the donation total: