Fixes #440

Changes to be included:

• 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 or a hybrid solution. valuable::Value can not hold owned data makes it difficult to cover the derived value during rendering
• Context navigation API needs to be updated to use Valuable access APIs.
• update modules related to rhai for exchange between Valuable and Dynamic