Move Zephyr app into subdirectory.

app/Kconfig

@@ -0,0 +1,84 @@
+mainmenu "ZMK Firmware"
+
+config ZMK_KEYBOARD_NAME
+	string "Keyboard Name"
+
+config USB_DEVICE_PRODUCT
+	default ZMK_KEYBOARD_NAME
+
+config BT_DEVICE_NAME
+	default ZMK_KEYBOARD_NAME
+
+config ZMK_KSCAN_EVENT_QUEUE_SIZE
+	int "Size of the event queue for KSCAN events to buffer events"
+	default 4
+
+menu "HID Output Types"
+
+config ZMK_USB
+	bool "USB"
+	select USB
+	select USB_DEVICE_STACK
+	select USB_DEVICE_HID
+
+menuconfig ZMK_BLE
+	bool "BLE (HID over GATT)"
+	select BT
+	select BT_SMP
+	select BT_SMP_SC_PAIR_ONLY
+	select BT_PERIPHERAL
+	select BT_GATT_DIS
+	select BT_GATT_BAS
+
+if ZMK_BLE
+
+# HID GATT notifications sent this way are *not* picked up by Linux, and possibly others.
+config BT_GATT_NOTIFY_MULTIPLE
+	default n
+
+config BT_DEVICE_APPEARANCE
+	default 961
+
+config ZMK_BLE_PASSKEY_ENTRY
+	bool "Experimental: Requiring typing passkey from host to pair BLE connection"
+	default n
+
+# Incresed stack due to settings API usage
+# CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+# 
+# CONFIG_BT_SETTINGS=y
+# CONFIG_FLASH=y
+# CONFIG_FLASH_PAGE_LAYOUT=y
+# CONFIG_FLASH_MAP=y
+# CONFIG_NVS=y
+# CONFIG_SETTINGS=y
+
+endif
+
+endmenu
+
+config ZMK_KSCAN_MOCK_DRIVER
+	bool "Enable mock kscan driver to simulate key presses"
+	default n
+
+
+config ZMK_KSCAN_COMPOSITE_DRIVER
+	bool "Enable composite kscan driver to combine kscan devices"
+	default n
+
+menu "ZMK Actions"
+
+config ZMK_ACTION_MOD_TAP
+	bool "Enable the Mod-Tap Action"
+	
+endmenu
+
+module = ZMK
+module-str = zmk
+source "subsys/logging/Kconfig.template.log_config"
+
+rsource "boards/Kconfig"
+rsource "boards/shields/*/Kconfig.defconfig"
+
+source "Kconfig.zephyr"
+