Remove some use of keymap.h (#19980)

quantum/keymap_common.h

@@ -0,0 +1,7 @@
+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+// translates key to keycode
+uint16_t keymap_key_to_keycode(uint8_t layer, keypos_t key);