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/news.lua

@@ -72,15 +72,23 @@ function M.open(file, opts)
     end
   end
 
-  local float = require("lazy.util").float({
-    file = file,
-    size = { width = 0.6, height = 0.6 },
+  Snacks.config.style("news", {
+    width = 0.6,
+    height = 0.6,
+    wo = {
+      spell = false,
+      wrap = false,
+      signcolumn = "yes",
+      statuscolumn = " ",
+      conceallevel = 3,
+    },
   })
-  vim.opt_local.spell = false
-  vim.opt_local.wrap = false
-  vim.opt_local.signcolumn = "yes"
-  vim.opt_local.statuscolumn = " "
-  vim.opt_local.conceallevel = 3
+
+  local float = Snacks.win({
+    file = file,
+    style = "news",
+  })
+
   if vim.diagnostic.enable then
     pcall(vim.diagnostic.enable, false, { bufnr = float.buf })
   else