cwd command doesn't support autocomplete by Tab key

### Describe the bug

_No response_

### Affected version

_No response_

### Steps to reproduce the behavior

1. Run copilot
2. type /cwd d:\
3. Press the Tab key
4.  Autocomplete did not appear

### Expected behavior

I expect an autocomplete list to appear, as in a regular terminal.

### Additional context

_No response_