Overhauled Overhaulings

This took a lot of error handling to get it to the Web because of some interesting WebAssembly issues that seemed to pop up. Fortunately those bugs should be fixed, but should you find any please let me know!

• New character panel, including shaders for unlocks. Progress/tracking window coming soon!
• New starting weapon panel to complement the new character panel.
• Lots of behind-the-scenes refactoring to fix my past mistakes and to be a little more future-proof.
• New icons for the weapons instead of just using the sprites.
• Health bar's damage indicator should be shrink a little nicer.