fix compilation and linking with pyimgui

[KinoxKlark]

Hey, as a follow-up of the conversation in KinoxKlark/pyimgui#2 here is my fixes.

You don't have to copy the core.pxd from imgui, my bad. You only need to have the imgui module installed or accessible. In my quick toy exemple, I had to copy the lib (.pyd or .so) since I didn't install the module but when compiling pyimgui it is automatically installed on your environment for convenience. Thus it is not even necessary to copy anything from pyimgui.

I had to include config-cpp/ for compilation.

cimport is on imgui.core not core (this would be implot.core)

With theses changes I can compile and I get:

>>> import implot
>>> import imgui
>>> ctx = imgui.create_context()
>>> _ = implot.create_context()
>>> implot.set_imgui_context(ctx)

Without any errors!

[hinxx]

This works! Thank you very much! 🥳

cimport is on imgui.core not core (this would be implot.core)

So this actually makes sure that the *.so is loaded from the original place, avoids copying and solves the:

TypeError: Argument 'ctx' has incorrect type (expected imgui.core._ImGuiContext, got imgui.core._ImGuiContext)

Subtle 🤕