🧹 [Maintenance]: Document compatibility/integration with net/http

[gaby]

Maintenance Task Description

Add new section in the documentation that explains in detail compatibility and integration with net/http.

Section should also have useful examples of how to use the adaptor middleware, benefits and cons.

Impact on the Project

Allow users to integrate their existing net/http applications more easily with Fiber.

Additional Context (optional)

No response

Checklist:

• I have confirmed that this maintenance task is currently not being addressed.
• I understand that this task will be evaluated by the maintainers and prioritized accordingly.
• I am available to provide further information if needed.