[BREAKING] Upgrade to wit-parser 0.1.0 and incorporate it into wit generation

[willemneal]

This issue outlines the current work in wit-bindgen: https://github.com/bytecodealliance/wit-bindgen/issues/201

They also recently created a 0.1.0 tag for the project. I took this as an opportunity to publish aha-wit-parser, which has the same version just different name. It can be added like so:

wit-parser = { version = "0.1.0", package = "aha-wit-parser" }

• [ ] Add parser as a test dep
• [ ] Update key words and syntax changes
• [ ] Generate a wit AST instead of string