[Feature]: SetSampler* support

[jeffwtm]

Pre-submission Checklist

• I have read the README features list
• I have read the FAQ Wiki
• I have searched existing issues and this feature hasn't been requested
• I have verified this feature doesn't already exist in the package

Problem Statement

ImGui supports setting the sampler via:

draw_list->AddCallback(ImGui::GetPlatformIO().DrawCallback_SetSamplerNearest);
draw_list->AddImage(....);

Feature described here: ocornut/imgui#9378

However, the DrawCallbacks are not currently exposed by ImGuiPlatformIOPtr (I couldn't find them in the backends either, not sure if anything needs to be added there).

Would be great to add these if it's not a difficult change!

Proposed Solution

Expose DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, and DrawCallback_SetSamplerNearest in ImGuiPlatformIOPtr for all backends.

Alternatives Considered

No response

Additional Context

No response

[JunaMeinhold]

Hi, you have to implement those yourself and pass them.
I cannot expose them like the rest.

[jeffwtm]

Oh didn't realize that! Do you know why that is? Or if there happen to be any examples of that? No prob if not, thanks either way :)

[JunaMeinhold]

Could be also a version thing, the c# wrapper is not up to date due to the PR draft and my limited capacity to handle all of it.

[jeffwtm]

Understood, no worries. Many thanks for the great library!