Merge Essnmx

[YooSunYoung]

I followed the instructions and it worked as expected I think...?

But the pixi install didn't work. How do I prevent it from using dev version??
@MridulS

Because only essreduce[test]==0.1.dev2116+ga48ecb40c.d20260305 is available and
      essimaging==0.1.dev1616+g3b76b4549.d20260302 depends on essreduce>=25.11.2, we can conclude that
      essimaging==0.1.dev1616+g3b76b4549.d20260302 and all versions of essreduce[test] are incompatible.
      And because only essimaging[test]==0.1.dev1616+g3b76b4549.d20260302 is available, we can conclude that all versions
      of essimaging[test] and all versions of essreduce[test] are incompatible.
      And because you require essreduce[test] and essimaging[test], we can conclude that your requirements are
      unsatisfiable.