feat: add terminal mode escape keybind

  Maps Escape key to exit terminal mode using Ctrl-\ Ctrl-n sequence.
  Improves terminal workflow by providing intuitive way to return to
  normal mode from terminal insert mode.

Signed-off-by: Marcelo Borges <[email protected]>

Author: jmarcelomb

lua/config/keymaps.lua

@@ -6,3 +6,5 @@ local map = LazyVim.safe_keymap_set
 
 -- -- Repeat last macro
 map("", ",", "@@", { desc = "Run last macro" })
+
+map("t", "<Esc>", "<C-\\><C-n>", { desc = "Exit terminal mode" })