feat: use system ls command

README.md

@@ -69,4 +69,17 @@ token_limit: 3000
 - Check `ChatGPT_Debug_Log` if `improved_debug` is on, or the Neovim messages if `debug` is on, for detailed info.
 - You can close the selection or prompt buffers at any time with commands like `:bd`, `:x`, or `:wq`. No need to rely on `:q`.
 
+## Debug Commands
+If `enable_debug_commands` is true, you can include commands like these in your YAML:
+```yaml
+commands:
+  - command: "list"
+    dir: "some/directory"
+
+  - command: "grep"
+    pattern: "searchString"
+    target: "path/to/file/or/directory"
+```
+The **list** command now uses the Linux `ls` command to list directory contents. The **grep** command searches for a given pattern in a file or all files in a directory.
+
 Enjoy your improved, more flexible ChatGPT Neovim plugin with step-by-step support!