DvcIgnoreFilter.find() includes directories in results, breaking ignore patterns

DvcIgnoreFilter.find() includes directories in results, breaking ignore patterns: a task in harbor-swesmith-rl-artifacts: Harbor SWE-Smith 强化学习数据产物 (Harbor dataset). I noticed that in the latest version, the find() method in DvcIgnoreFilter is now including directories in the results, which seems…

The task

I noticed that in the latest version, the `find()` method in `DvcIgnoreFilter` is now including directories in the results, which seems to be breaking the ignore pattern functionality.

Part of keryszhan/harbor-swesmith-rl-artifacts.