feat(extras): added extra for snacks picker (#5368)

## Description

See https://github.com/folke/snacks.nvim/pull/445

NOTE: I'm **not** going to replace `fzf-lua` anytime soon. Learned my
lessons with that one :)

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## Checklist

- [x] I've read the
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lua/lazyvim/plugins/editor.lua

@@ -397,4 +397,10 @@ return {
       return LazyVim.pick.want() == "telescope"
     end,
   },
+  {
+    import = "lazyvim.plugins.extras.editor.snacks_picker",
+    enabled = function()
+      return LazyVim.pick.want() == "snacks"
+    end,
+  },
 }