restructured test folder and enabled cmake v3 support

unittest/user/testcfg/events/subsystemIdRanges.h

@@ -0,0 +1,18 @@
+#ifndef CONFIG_EVENTS_SUBSYSTEMIDRANGES_H_
+#define CONFIG_EVENTS_SUBSYSTEMIDRANGES_H_
+
+#include <cstdint>
+#include <fsfw/events/fwSubsystemIdRanges.h>
+
+/**
+ * @brief	Custom subsystem IDs can be added here
+ * @details
+ * Subsystem IDs are used to create unique events.
+ */
+namespace SUBSYSTEM_ID {
+enum: uint8_t {
+	SUBSYSTEM_ID_START = FW_SUBSYSTEM_ID_RANGE,
+};
+}
+
+#endif /* CONFIG_EVENTS_SUBSYSTEMIDRANGES_H_ */