Create windows shortcuts with micromamba

[huche6]

Checklist

• I added a descriptive title
• I searched open requests and couldn't find a duplicate

What is the idea?

When creating a windows installer with micromamba, the process is stopped in main.py by

    if osname == "win" and "micromamba" in os.path.basename(info['_conda_exe']):
        # TODO: Remove when shortcut creation is implemented on micromamba
        sys.exit("Error: micromamba is not supported on Windows installers.")

However, micromamba does handle shortcut creation. A release of 2021 (0.14.0) states that :

• [micromamba] if menuinst json files are present, micromamba will create
  shortcuts in the start menu on Windows
  The only problem is that the creation of the menu is called with the command

push '"$INSTDIR\_conda.exe" constructor --prefix "$INSTDIR" --make-menus @MENU_PKGS@'

in main.nsi.tmpl. The --make-menus cli is not available with micromamba.
Would it be possible to create the menus in a different way which would make it compatible with conda and micromamba ?

Why is this needed?

• To make it possible to create windows installer with micromamba which allows to have smaller installer.

What should happen?

No response

Additional Context

No response

[huche6]

It seems that #474 can solve this