[feature request] Expand file lists with wildcards for Windows

Hi, thanks development.

I use Just in cmd.exe on Windows, but I am having trouble because the Windows shell does not perform wildcard expansion. I need $(wildcard ).

I extract files using the following method, but if there are no matching files, dir returns an error, which stops the process.
` PNG_SRC := shell(‘dir /B *.png’)`

Additionally, there is no way to retrieve a list of files in subdirectories as follows:
` PNG_SRC := shell(‘dir /B clip/*.png’)`

In Makefile, we can retrieve a list of files using $(wildcard *.png ), so it would be great if an equivalent feature existed.``