Feature request: Ignore specific filetypes

I want to disable completions in specific filetypes, such as Telescope pickers. It's quite jarring to suddenly have ghost text in the input box.

<img width="839" height="78" alt="Image" src="https://github.com/user-attachments/assets/7cafd15e-ba1a-4bd4-ae3e-268fb1cf6444" />