feat(core)!: move a bunch of LazyVim features to snacks.nvim (#4706)

## Description

LazyVim comes with a bunch of smaller QoL plugin like features, but it's
not easy for non LazyVim users to use them.

That's why I started working on
[snacks.nvim](https://github.com/folke/snacks.nvim), a collection of
small QoL plugins for Neovim.

Snacks also includes a bunch of new improvements to these features.

This PR fully integrates with snacks.

## Todo

- [ ] add proper deprecations where needed
- [ ] create snacks docs
- [ ] document all the new improvements relevant to LazyVim users

## Closes

- [ ] #4492 
- [ ] #4333
- [ ] #4687

## Screenshots

<!-- Add screenshots of the changes if applicable. -->

## Checklist

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

lua/lazyvim/util/mini.lua

@@ -121,7 +121,7 @@ end
 
 ---@param opts {skip_next: string, skip_ts: string[], skip_unbalanced: boolean, markdown: boolean}
 function M.pairs(opts)
-  LazyVim.toggle.map("<leader>up", {
+  Snacks.toggle({
     name = "Mini Pairs",
     get = function()
       return not vim.g.minipairs_disable
@@ -129,7 +129,8 @@ function M.pairs(opts)
     set = function(state)
       vim.g.minipairs_disable = not state
     end,
-  })
+  }):map("<leader>up")
+
   local pairs = require("mini.pairs")
   pairs.setup(opts)
   local open = pairs.open