[Keyboard] Add Lunakey Pico (#18202)

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/yoichiro/lunakey_pico/halconf.h

@@ -0,0 +1,8 @@
+// Copyright 2022 Yoichiro Tanaka (@yoichiro)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define HAL_USE_SIO TRUE
+
+#include_next <halconf.h>