PR 816 Broke Anaconda Activation Support on Windows

[joeyame]

Today I came across the Anaconda activation scripts and chose to use the nu_conda_2 variant. After following the setup instructions, I could not get the command to work. At best, when I removed conda from my path, I could type conda conda activate X to run the activate function.

Looking into the history of the file, yesterday (what are the odds?) a PR went in which was intended to make the command: conda activate instead of activate. This was #816, by @MilesCranmer.

My initial guess is that Miles uses linux while I am using Windows, which means nushell is behaving differently on the two platforms for this specific case.

This script should be updated to possibly support both variants (before and after #816), because I had to go to a previous version of the file to get it to work on Windows. With the previous version, conda activate works as expected on Windows