fix(generator): generates invalid code for the same path parameter appears multiple times

[YumNumm]

This PR fixes an issue with path parameter replacement in RetrofitGenerator.
This modification allows for multiple occurrences of the same Path Parameter to be properly replaced in API Endpoint URL.

Changes

• Changed replaceFirst to replaceAll in the path parameter replacement logic
• Added test cases to verify multiple path parameter replacements

Example

https://x.com/YumNumm/status/1880651949508612347

---

Before:

@Get('/users/{id}/posts/{id}')
Future<ResponseType> getUserPosts(@Path('id') String id);
// Only replaces first occurrence: `/users/123/posts/{id}`

After:

@Get('/users/{id}/posts/{id}')
Future<ResponseType> getUserPosts(@Path('id') String id);
// Replaces all occurrences: `/users/123/posts/123`

Related Issues

N/A