Remove usages of anyhow::Error in library code

[bartlomieju]

Instead any error type that needs to cross Rust->JS boundary should require to implement ToV8Error trait.

Example "footgun" usage:
https://github.com/denoland/deno_core/blob/0f7fced6e574393f2673461b6e9fc12a461eca23/core/error.rs#L126C8-L126C19

[dsherret]

It would also be nice if I could have a rust type that implements this trait and define properties that should be set on the error object. For example, in this scenario I want to define code easily for JS on the Rust error type, but still use this error type mostly in Rust:

try {
  const test = require("#import-test");

} catch(err) {
  console.log(err);
  console.log(err.code); // ERR_PACKAGE_IMPORT_NOT_DEFINED
}