The option to toggle the display of the number of items in a directory is already available in the TUI by pressing c, but the items column is always hidden by default. There's no CLI option to show that column in the TUI and in non-interactive and export output modes, and also no way to set that in the gdu.yaml config file.

Describe the solution you'd like

Allow a CLI option, such as --show-counts/-C, and corresponding config file setting show-counts: true to enable showing the number of items column by default (in JSON output, include explicit items property instead of merely checking array length).

An even better enhancement would be separating "number of items" values into distinct "number of files" and "number of subdirectories" counts (in JSON output, include files and subdirs properties instead of items for directory objects).