Make preview usable

[Raynbda]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Preview is super clunky to use right now, every time i want to preview a folder i have to move my mouse to the next result.

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I should be able to enable preview, then with my arrow keys or with the "go to next result" or "go to previous result" shortcuts scroll the search results while still previewing. Like quicklook in file explorer

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add always on top to preview

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https://github.com/adirh3/Fluent-Search/assets/116586370/f1440028-266f-4d20-ab75-8fbe3f690282