Minsoo Jun

[Docs] Add guide for adding custom autocomplete specs using `autocomplete-tools`

1

### Feature Description ### Problem: Currently, there is no official documentation on how to register custom local autocomplete specs (created via [withfig/autocomplete](https://github.com/withfig/autocomplete) and [withfig/autocomplete-tools](https://github.com/withfig/autocomplete-tools)) into `kiro-cli`. Users who want to...