Support for serialization of path parameters

### Prerequisites

- [x] I have written a descriptive issue title
- [x] I have searched existing issues to ensure the feature has not already been requested

### 🚀 Feature Proposal

It seems like path parameters do not have serialization support using `style` and `explode` in fastify swagger. https://swagger.io/docs/specification/v3_0/serialization/. Is it possible to add this support similar to query parameters somewhere here -> https://github.com/fastify/fastify-swagger/blob/3b1051c5d7da96ba58a1c48a0ddda0ca991cb38e/lib/spec/openapi/utils.js#L181?

### Motivation

_No response_

### Example

_No response_