Valuable as the type system

[sunng87]

Introduction to valuable

• https://tokio.rs/blog/2021-05-valuable
• https://github.com/tokio-rs/valuable

Valuable solve the problem of our data container. Currently by converting data into serde_json::Value, it has to be fully copied. According to our large_loop_helper benchmark, it takes 50% of time in that case.

[sunng87]

changes to adopt Valuable:

• Update Context API to hold a borrowed reference of any T: Valuable, currently it owns a converted serde_json::Value
• Update Registry render apis to accept T: Valuable instead of serde::Serialize
• Update internal type system from serde_json::Value to valuable::Value, since valuable has more types than JSON, we may need to map between these types. Changes will happen in value
• Context navigation API needs to be updated to use Valuable access APIs.
• update modules related to rhai for exchange between Valuable and Dynamic

moved to #452