Expanded handler implementation, more key defines.

src/handlers.c

@@ -0,0 +1,25 @@
+
+#include "handlers.h"
+
+#include "usb_hid.h"
+
+__attribute__((weak)) bool zmk_handle_key_user(struct zmk_key_event key_event)
+{
+	return true;
+};
+
+void zmk_handle_key(struct zmk_key_event key_event)
+{
+	if (!zmk_handle_key_user(key_event))
+	{
+		return;
+	}
+	if (key_event.pressed)
+	{
+		zmk_usb_hid_press_key(key_event.key);
+	}
+	else
+	{
+		zmk_usb_hid_release_key(key_event.key);
+	}
+};