bug: setup modifies shell profile even when told not to

### 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
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

Fedora 42

### Expected behaviour

✔ Do you want q to modify your shell config (you will have to manually do this otherwise)? · No

The setup should not change .bashrc / .bash_profile if the above option is selected

### Actual behaviour

Note in the attached screenshot, I hit ctrl-C at the builder prompt, but it had already auto-installed into my shell profile.

### Steps to reproduce

Run the zip setup installer, select "no" to update shell config

### Environment

```yaml

```