Hello,

This pull request aims to improve usage of lmstudio ai provider for
remote lmstudio nodes and support api key authentication.

This has been tested on my local network from a headless lms node. See
attached demo vid

Release Notes:

- lmstudio: Added support for specifying an API key via the UI


https://github.com/user-attachments/assets/7594cf49-3198-4171-b3e9-c3264cf35b6e

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Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>