Handle libraries with the compiler

Sometime before the beta we should handle the usage of TypeScript/JavaScript libraries within Axolotl TypeScript code. This will be challenging because the libraries may or may not be typed so we won't be able to lean on TypeScript nearly as much.

[Seahorse handles Python modules](https://github.com/ameliatastic/seahorse-lang/tree/main/src/core#preprocess) and still does type-checking so we should be able to draw inspiration there.