bug: Save conversation does not support blank space in pathname

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue

### Operating system

MacOS

### Expected behaviour

- `/save` support blank space in pathname
- `/save` support quotation mark (```"``` and ```'```) for pathname

```bash
/save "/Users/home/Document 1"
```
will export conversation successfully.

### Actual behaviour

Error message:

```txt
Failed to export to [only pathname before space]: No such file or directory (os error 2)
```

### Steps to reproduce

_No response_