'/datapack create' can create directories with illegal names

The /datapack create command can be used to create directories with illegal names. On Windows, this allows for the creation of directories named con, prn, aux, com1 through com9, and lpt1 through lpt9, but strangely, not nul.

How to reproduce:

The following command can only be used to reproduce this issue on Windows, since the specified directory name is allowed on other operating systems.

1. Execute the following command:

   /datapack create con "Test"

   → ❌ The command succeeds, and a directory called con is created in the world’s data pack folder.

Expected result:

The /datapack create command would not be able to create illegally named directories.

Observed result:

The /datapack create command can create illegally named directories.