feat(snacks.picker): added alt-c to toggle between cwd/root dir

lua/lazyvim/plugins/extras/editor/snacks_picker.lua

@@ -27,11 +27,32 @@ end
 
 return {
   desc = "Fast and modern file picker",
-  -- recommended = true,
+  recommended = true,
   {
     "folke/snacks.nvim",
     opts = {
-      picker = {},
+      picker = {
+        win = {
+          input = {
+            keys = {
+              ["<a-c>"] = {
+                "toggle_cwd",
+                mode = { "n", "i" },
+              },
+            },
+          },
+        },
+        actions = {
+          ---@param p snacks.Picker
+          toggle_cwd = function(p)
+            local root = LazyVim.root({ buf = p.input.filter.current_buf, normalize = true })
+            local cwd = vim.fs.normalize((vim.uv or vim.loop).cwd() or ".")
+            local current = p:cwd()
+            p:set_cwd(current == root and cwd or root)
+            p:find()
+          end,
+        },
+      },
     },
     -- stylua: ignore
     keys = {