Fix ChibiOS version display to show correct product version (#178)

The 'show system' command was displaying only the RT kernel version (5.1.0)
instead of the actual ChibiOS product version (18.2.2).

This commit:
- Adds include for chversion.h to access CH_VERSION macro
- Updates display to show both ChibiOS product version and RT kernel version
- Changes output from 'ChibiOS 5.1.0' to 'ChibiOS 18.2.2 (RT 5.1.0)'

This provides users with complete version information about both the
ChibiOS product and the specific RT kernel version being used.

Author: seuros

src/common/common.c

@@ -21,6 +21,7 @@
 
 #include "hydrabus.h"
 #include "hydrafw_version.hdr"
+#include "chversion.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -218,7 +219,7 @@ void cmd_show_system(t_hydra_console *con)
 	cprintf(con, "Flash Size:   %dKB\r\n", *((uint16_t*)0x1FFF7A22));
 	cprintf(con, "\r\n");
 
-	cprintf(con, "Kernel:       ChibiOS %s\r\n", CH_KERNEL_VERSION);
+	cprintf(con, "Kernel:       ChibiOS %s (RT %s)\r\n", CH_VERSION, CH_KERNEL_VERSION);
 #ifdef PORT_COMPILER_NAME
 	cprintf(con, "Compiler:     %s\r\n", PORT_COMPILER_NAME);
 #endif