zawakin/tree2md

AI Summary: This GitHub issue proposes adding a `--stats` command-line flag to a tree output tool. When activated, this flag would append a summary of the file system, including the total count of directories, files, and their combined size, after the standard tree structure. The issue is marked as a "Good First Issue" and provides clear implementation steps for adding the flag, a statistics struct, and collecting data during tree traversal.