StreamingAssets folder like Unity?

Hi I’m working on a plugin that has external D3D11 vertex/pixel shaders.
Because the docs on “Content in Plugins” doesn’t exit here: Plugins | Unreal Engine Documentation

… I’m not sure where to put the shader (.cso) files. Is there a “special” folder like Unity3D has called “StreamingAssets” that leaves raw data files untouched when packaging?
Also if a folder like this does exist, is there a C++ UE4 API for getting its path directory?

I see I can show/view plugin content via the “View Options”: Folders | Unreal Engine Documentation
Although this doesn’t allow me to add “unknown” types like the “.cso” files.

Any ideas?