feat: return IServiceCollection from AddGridifyMappers

[skolmer]

Description

This is just a small change that allow us to chain AddGridifyMappers with other calls

builder.Services.AddDbContext<MyDbContext>()
    .AddGridifyMappers(Assembly.GetExecutingAssembly())
    .AddAutoMapper(Assembly.GetExecutingAssembly())

[what-the-diff]

PR Summary

• Modification to the AddGridifyMappers Method
  The AddGridifyMappers method, found in DependencyInjectionExtensions.cs file, has been updated. Previously, this method didn't return anything. Now, it's improved to return an object known as IServiceCollection. This allows more flexibility and interaction with the services in our application, leading to better overall software design and functionality.

[alirezanet]

Hi @skolmer,
Awesome thanks 💐