feat(keymaps): dynamic which-key icons/descriptions for toggles (#4050)

## Description

<!-- Describe the big picture of your changes to communicate to the
maintainers
  why we should accept this pull request. -->

## Related Issue(s)

- [ ] Closes #4025

## Screenshots


![image](https://github.com/user-attachments/assets/8453c23c-d560-490c-9f96-a22ea88f45fd)

## Checklist

- [ ] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.

lua/lazyvim/util/mini.lua

@@ -121,6 +121,15 @@ end
 
 ---@param opts {skip_next: string, skip_ts: string[], skip_unbalanced: boolean, markdown: boolean}
 function M.pairs(opts)
+  LazyVim.toggle.map("<leader>up", {
+    name = "Mini Pairs",
+    get = function()
+      return not vim.g.minipairs_disable
+    end,
+    set = function(state)
+      vim.g.minipairs_disable = not state
+    end,
+  })
   local pairs = require("mini.pairs")
   pairs.setup(opts)
   local open = pairs.open