Enhancement: factory from json schema

### Summary

Hiya strangers,

I work a lot with schemas these days, and its in general a pain to generate good quality values for them. Polyfactory is a great option for this.

### Basic Example

```python
from referencing.jsonschema import DRAFT202012

class MySchemaFactory(SchemaFactory[DRAFT202012]):
__schema__ = "schemas/my_schema.yaml"
```

### Drawbacks and Impact

None to my knowledge. Its possible not to use `referencing` for this, but this library is used in `jsonschema` as well. So I think its a good dependency.

### Unresolved questions

Nope

No repository files or tests are named. Start by reviewing the existing factory abstractions and the referencing.jsonschema integration mentioned in the proposal; done should include a SchemaFactory that can use a schema path such as schemas/my_schema.yaml to generate valid values.

Written by the indexing model from the issue text.