feature: Set percents for margin

[Shatur]

Did you check the docs?

• I have read all the which-key.nvim docs

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

which-key.nvim is awesome, but it takes too much space on the screen when displayed.

Describe the solution you'd like

I would like to display it like in Helix:

Here is what I currently use:

require('which-key').setup({
  window = {
    margin = { 1, 100, 1, 0 },
  },
})

It results in the following:

But it depends on the window size, for example if I maximize the window it will look this way:

Describe alternatives you've considered

As alternative we could have an option to display whichkey.nvim vertically.

Additional context

No response

[KnockerPulsar]

Similar to #320. I'd also like this feature.

[folke]

Just implemented this. Margin values between 0 and 1 will be a percentage of the screen size:

Use the values below to get something similar to what you want:

{
      window = { margin = { 1, 0, 0, 0.6 } },
      layout = { height = { min = 4, max = 75 } },
}