Build system overhaul

[CactusPuppy]

This PR does a lot of things at once:

• Switches the source code to TypeScript to make it easier to understand what the data being passed around looks like
• Introduces the use of ESLint for code styling
• Builds the final OverPy executable bundle with esbuild instead of a homebrewed build system to introduce source maps for far easier debugging
• Removes obfuscation directives entirely. Obfuscation no longer works in OW2's Workshop editor, and was also a complete pain to maintain anyways.

TODO:

• [x] Finish porting all extension functionality
• [x] Complete moving all VS Code extension files to root level
• [x] Properly build extension without miscellaneous junk files (see https://github.com/microsoft/vscode-vsce/issues/12)
• [x] Introduce unit tests (Jest?) (no longer planned)
• [x] Introduce behavior testing (documented at https://code.visualstudio.com/api/working-with-extensions/testing-extension) (no longer planned)
• [x] Replace vm2 with a different sandboxed JS interpreter
• [x] Add Prettier in a Husky pre-commit hook to enforce code styling

[CactusPuppy]

I ain't reading all that, but it does compile Ana PB successfully 🎉

The only thing I noticed is that OverPy doesn't include comments from Values in @Conditions anymore: (In https://github.com/JinkoMinko/ana-paintball/blob/827626c696392a4b139cf62984a9fb60daf55561/medals.opy#L136)

but it does include them for Values in the actions block, like in here: https://github.com/JinkoMinko/ana-paintball/blob/dfa292183722614709f363a767505f13b705c032/nano.opy#L8

Resolved in a91e4e5