Enhancement: add support for skelet

### Summary

Hi!

I’m an author of [`skelet`](https://github.com/mutating/skelet) - a library for configs collecting. It works like dataclasses, but with more batteries.

It could be a good idea for your users to make some artificial data for it.

### Basic Example

_No response_

### Drawbacks and Impact

_No response_

### Unresolved questions

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No file, test, entry point, or concrete acceptance criteria are named. Start by clarifying which skelet configurations polyfactory should support and how generated artificial data should behave, then identify the relevant existing factory integration pattern and add tests that demonstrate the agreed behavior.

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