Add multi-directory selection support for globs

Why it matters

This feature allows users to specify multiple directory patterns within a single glob expression, improving flexibility and convenience when selecting files across various directories. It simplifies file matching scenarios where multiple directory names need to be targeted simultaneously.

How to use it

Users can include multi-directory patterns within curly braces in their file path globs. For example, using a pattern like /path/to/{dir1,dir2,dir3}/*.csv will match files in any of the listed directories.