Add Adapt extensions with temporary TypeAdapterConfig and TypeAdapter…

[roohial57]

This PR introduces two new overloads of the Adapt extension method in Mapster that make applying a small, temporary configuration extremely simple and concise:

Purpose:
Allow mapping with a temporary TypeAdapterConfig or a dedicated TypeAdapterSetter without modifying GlobalSettings.

Key Features:
Simplifies one-off mappings with minimal configuration.
Does not affect GlobalSettings, keeping existing mappings intact.
Supports both generic mapping (TSource -> TDestination) and mapping with a temporary configuration.

Tests:
Includes MSTest + Shouldly tests covering:
Mapping with temporary config
Mapping with setter
Ensuring GlobalSettings remain unchanged
Mapping with object initializer

Usage Example:

var result = source.Adapt(cfg =>
{
cfg.NewConfig<SourceDto, DestinationDto>()
.Map(dest => dest.Id, src => 42);
});

var result2 = source.Adapt<SourceDto, DestinationDto>(setter =>
{
setter.Map(dest => dest.Id, src => 99);
});

[DocSvartz]

@roohial57 Great job 👍

@andrerav @stagep I think this should be part of Mapster.Fluent, what do you think about this?

[roohial57]

@roohial57 Great job 👍

@andrerav @stagep I think this should be part of Mapster.Fluent, what do you think about this?

I do not have any idea; what do you think?

[roohial57]

I really enjoyed this collaboration and hope to be even more helpful to the Mapster project in the future.
If needed, I can also submit this as a pull request to fluent-mapster.
@DocSvartz

[DocSvartz]

@roohial57 Thank you for your contribution to Mapster.

If needed, I can also submit this as a pull request to fluent-mapster.

Since no one has spoken out against including this in the main project, there's no need to include it in the fluent mapster. Thanks.