Bug: Custom provider types are not generated correctly if it has the same name as a built in provider

This was introduced with v2.0.0.

We have a custom shopify provider in our project.

The type generation returns the wrong type.

<img width="444" height="161" alt="Image" src="https://github.com/user-attachments/assets/00325c9c-efd0-449e-97f3-df45009dc4ab" />

Code line: https://github.com/nuxt/image/blob/main/src/module.ts#L125
