feature: footer keys on the picker

[noirbizarre]

Did you check the docs?

• [x] I have read all the snacks.nvim docs

Is your feature request related to a problem? Please describe.

Snacks.picker is now a central piece of my Neovim setup. However, some pickers that I use less often have some extra keybindings I struggle to remember.

Describe the solution you'd like

It would be great to have a footer_keys option enabling a footer with the keys, but something a bit more dynamic than the win.footer_keys that would display the keys for the current active window (input, list, preview) below the current layout.

Describe alternatives you've considered

Already tried using:

• picker.win.input.footer_keys: break the display (to many keys to display for the size)
• picker.win.list.footer_keys: nothing displayed
• picker.win.preview.footer_keys: currently enabled in my config, only display the preview shortcut

This approach makes many keys in a small place (in the case of half listing, half preview), displays duplicate common keys (cancel, cycle_win...), and is not contextual (displayed for each part of the layout, focused or not).

Additional context

No response

[folke]

I just pushed a change where opts.footer_keys can now also be a list of lhs keymaps to display, instead of just showing all of them.

[noirbizarre]

Thanks, it will be useful for some cases.

After submitting this issue, I gave a try at what I had in mind resulting in #2501. I would love some feedback on it 🙏🏼

[github-actions[bot]]

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