Preparation for sharing

- rustfmt
- clippy
- comments
- README

src/pipeline/import_resolution/decls.rs

@@ -1,5 +1,3 @@
-use crate::interner::Token;
+use crate::interner::{Sym, Tok};
 
-pub trait InjectedAsFn = Fn(
-  &[Token<String>]
-) -> Option<Token<Vec<Token<String>>>>;
+pub trait InjectedAsFn = Fn(&[Tok<String>]) -> Option<Sym>;