## Description

Implementing a feature request from @hayes-mysten to have a Move value
representation that is more directly "JSON-like" (where Move concepts
map to directly to their JSON counterpart without any extra
boilerplate).

## Test Plan

New unit tests:

```
sui-graphql-rpc$ cargo nextest run -- types::move_value::tests
```

Tested on GraphiQL:


![image](https://github.com/MystenLabs/sui/assets/332275/50cbf433-4fbe-4e92-813a-faddf07c738a)

## Stack

- #14422 
- #14423 
- #14424 
- #14425
- #14485