Add profiles support

[dougg0k]

Hi,

Could you add profiles support?

You could have a dropdown with all the profiles, a button to create a new one, as you choose a profile that one is loaded and any changes made, are saved to it.

Might have to be a list, but show only when select to change profile. https://ratatui.rs/examples/widgets/list/

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If this is added. I suppose having a way to backup all profiles. Like a import and export, would be useful too.

An alternative would be through the cli, check this as example https://github.com/LeadSun/lamzu-cfg?tab=readme-ov-file#profiles