Windows support

[J-Rey]

Is your enhancement related to a problem? Please describe. I was able to install on Windows Server without errors but when trying to export then gave an error & didn't work:

Exporting site meta data...
Exporting users...
Exporting tables
'grep' is not recognized as an internal or external command,
operable program or batch file.
Zipping files....
Warning: Unable to create archive

Describe the solution you'd like Either implement full Windows support or do a simple test first before allowing it to be installed

I'm not that surprised that it isn't compatible but Windows is certainly used for development/staging of sites and using MU-Migration & WP-CLI to migrate between different dev environments would be great for multiple reasons.