Make descriptor default binding behavior explicit

[glucaci]

Currently when a InputObjectType or ObjectType is described, must always set BindingBehavior.Explicit

public class MyInputType : InputObjectType<MyInput>
{
    protected override void Configure(
        IInputObjectTypeDescriptor<MyInput> descriptor)
    {
        descriptor.BindFields(BindingBehavior.Explicit);
        
        // .. configure
    }
}

If this is not set, all the properties of the given type will be exposed.

It will be much "explicit" to have as default BindingBehavior.Explicit and possibility to switch on BindingBehavior.Implicit by registering the appropriate convention.

public void ConfigureServices(IServiceCollection services)
{
    services.AddSingleton<IBindingConventions, ImplicitBindingConvention>();
}

or more user friendly

public void ConfigureServices(IServiceCollection services)
{
    services.AddImplicitBindingConvention();
}

[michaelstaib]

This one is not implemented.... the default binding can be specified as a schema option.