Flyline-style automatic command completion #5222

Prerequisites

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Description of the new feature/enhancement

I'd like to bring an interesting Bash project to your attention: Flyline.

I've been using Flyline on Linux, and one of its standout features is its interactive completion system. As you type, it automatically displays completion suggestions, including executables available on PATH that you've never run before, alongside history-based suggestions.

It also provides fuzzy searching and a convenient interactive completion menu.

I know PSReadLine already supports Predictive IntelliSense and completion plugins, but I think Flyline's approach to integrating these features into a seamless interactive experience is worth looking at.

I'd love to see something similar available natively in PowerShell.

Thanks for considering it!

Proposed technical implementation details (optional)

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