[JAVA] Ability to deserialise JSON into POJO

## :rocket: Feature Request

### Affected Languages

- [ ] `TypeScript` or `Javascript`
- [ ] `Python`
- [X] `Java`
- [ ] .NET (`C#`, `F#`, ...)
- [ ] `Go`

### General Information

### Description

It would be great to be able to deserialise POJOs from json without having to construct them using the generated builders.

For example:

`
new ExampleProps(jsonString):
`

No files, tests, or entry points are mentioned. Start by locating the Java POJO generation and deserialization paths, then determine the API and compatibility requirements; done means Java consumers can deserialize JSON into POJOs without constructing generated builders.

Written by the indexing model from the issue text.