expand "." to cwd on Windows

`LazyVim.root.detectors.pattern` returns `.` when the pattern matches in the current directory. If we do not expand the directory, Snacks will consider the current terminal window is for another directory. Instead of hiding the window, Snacks opens a new terminal window instead.

lua/lazyvim/util/root.lua

@@ -78,7 +78,11 @@ function M.realpath(path)
   if path == "" or path == nil then
     return nil
   end
-  path = vim.fn.has("win32") == 0 and vim.uv.fs_realpath(path) or path
+  if vim.fn.has("win32") == 0 then
+    path = vim.uv.fs_realpath(path)
+  elseif path == "." then
+    path = vim.uv.cwd()
+  end
   return LazyVim.norm(path)
 end