Migrated the `Console` and `Random` APIs; got to the `StreamIO` API.

This commit migrates the `console`, `stream_io`, `random` and `text_encoding`  APIs to use rquickjs. 

One notable change in this commit is the introduction of the `Args` struct to tie the lifetime of `Ctx<'js>` and `Rest<Value<'js>>` arguments, given that explicit lifetime binding is not possible in Rust closures at the moment.

…rates

…nder the javy crate

 `cargo` doesn't seem to pickup the fact that `quickcheck` is only used in tests.

And prune unused ones

I wanted to avoid as much as possible using the underlying QuickJS unsafe APIs, but that introduced behavioral changes and bugs. So for now, I'm sticking to the previous implementation.

This commit introduces rquickjs 0.6.0 through a fork that contains Wasm specific performance improvements. We intend to upstream these improvements.

Adds special policy for rquickjs given that we're currently in a fork.