feat(app): Add CAN node application

This commit introduces a new CAN node application for the irrigation system.

The application initializes the settings subsystem and the valve system. It is intended to be used on a CAN bus to control a valve.
Signed-off-by: Eduard Iten <eduard@iten.pro>

software/apps/can_node/cdc-acm.overlay

@@ -0,0 +1,16 @@
+#include <zephyr/dt-bindings/gpio/gpio.h>
+
+&zephyr_udc0 {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+
+		modbus0 {
+			compatible = "zephyr,modbus-serial";
+			status = "okay";
+		};
+	};
+};
+
+&usart1 {
+	/delete-node/ modbus0;
+};