Move Zephyr app into subdirectory.

src/main.c

@@ -1,39 +0,0 @@
-/*
- * Copyright (c) 2020 Peter Johanson
- *
- * SPDX-License-Identifier: MIT
- */
-
-#include <zephyr.h>
-#include <device.h>
-#include <devicetree.h>
-#include <settings/settings.h>
-
-#include <logging/log.h>
-LOG_MODULE_REGISTER(zmk, CONFIG_ZMK_LOG_LEVEL);
-
-#include <zmk/matrix.h>
-#include <zmk/kscan.h>
-#include <zmk/endpoints.h>
-
-#define ZMK_KSCAN_DEV DT_LABEL(ZMK_MATRIX_NODE_ID)
-
-void main(void)
-{
-	printk("Welcome to ZMK!\n");
-
-	if (zmk_kscan_init(ZMK_KSCAN_DEV) != 0)
-	{
-		return;
-	}
-
-	if (zmk_endpoints_init())
-	{
-		printk("ENDPOINT INIT FAILED\n");
-		return;
-	}
-
-#ifdef CONFIG_SETTINGS
-	settings_load();
-#endif
-}