[Gif Search] Add download path preference

[ridemountainpig]

Description

Adds a new preference to define the download location of GIFs closes #15372

Screencast

Checklist

• [x] I read the extension guidelines
• [x] I read the documentation about publishing
• [x] I ran npm run build and tested this distribution build in Raycast
• [x] I checked that files in the assets folder are used by the extension itself
• [x] I checked that assets used by the README are placed outside of the metadata folder

[raycastbot]

Thank you for your contribution! :tada:

🔔 @josephschmitt @tmwrnr @j3lte @samuelkraft @Spookywy @seanparkross you might want to have a look.

You can use this guide to learn how to check out the Pull Request locally in order to test it.

You can expect an initial review within five business days.

[github-actions[bot]]

Published to the Raycast Store: https://raycast.com/josephschmitt/gif-search

[raycastbot]

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[Blendertom]

Thank you so much @ridemountainpig!!