Confusing doctor output for autocomplete

### 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

macOS 26.1.0 (25B78)

### Expected behaviour

$ kiro-cli doctor

✔︎ Autocomplete is disabled.

### Actual behaviour

$ kiro-cli doctor

✘ Autocomplete is enabled: Autocomplete disabled.

To fix run: kiro-cli settings autocomplete.disable false

✘ Doctor found errors. Please fix them and try again.

If you are not sure how to fix it, please open an issue with kiro-cli issue to let us know!

### Steps to reproduce

Steps to reproduce:

1. disable auto completion.
2. Run `kiro-cli doctor`.

The issue:

1. The error message is confusing.
2. The double-negative config setting is not the most optimal choice.
3. Shell auto-completion is *not a doctor issue*. `kiro-cli` works just fine without it.

I had to turn off Kiro's shell auto-complete, too distracting. It doesn't work particularly good with bash. I tried zsh for a bit, but never managed to configure out its quirks, so bash it is.

### Environment

```yaml

[q-details]
version = "1.22.0"
hash = "c87698cd8117cd8574a43ad215662a00fbd413f2"
date = "2025-12-10T21:12:17.970281Z (8d ago)"
variant = "full"

[system-info]
os = "macOS 26.1.0 (25B78)"
chip = "Apple M4 Pro"
total-cores = 14
memory = "48.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/opt/homebrew/Cellar/bash/5.3.9/bin/bash"
shell-version = "5.3.9"
terminal = "macOS"
install-method = "unknown"

[env-vars]
DISPLAY = "/private/tmp/com.apple.launchd.X6dfa64Irz/org.xquartz:0"
PATH = "/Users/USER/.local/share/mise/installs/node/20.19.6/bin:/Users/USER/.local/share/mise/installs/python/3.14.1/bin:/Users/USER/bin:/opt/homebrew/bin:/opt/spark/bin:/opt/homebrew/Cellar/scala@2.12/2.12.20/bin:/opt/homebrew/sbin:/Users/USER/.local/bin:/Users/USER/.toolbox/bin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/opt/pmk/env/global/bin:/opt/X11/bin:/Library/Apple/usr/bin:/Users/USER/.local/bin:/Users/USER/Library/Application Support/JetBrains/Toolbox/scripts"
QTERM_SESSION_ID = "14c5afbf0b334245a09f74717af7319f"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.22.0"
SHELL = "/opt/homebrew/bin/bash"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.apple.Terminal"
```