adds ISR check that is closer to productive code

This approach patches the existing trap handler to call the test routine

port/moonlight/CMakeLists.txt

@@ -3,11 +3,15 @@ set(THREADX4TGFS_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/../..)
 set(MOONLIGHT_SRC_DIR ${MOONLIGHT_ROOT}/src)
 set(MOONLIGHT_INC_DIR ${MOONLIGHT_ROOT}/inc)
 
+if(NOT DEFINED MOONLIGHT_TRAP_SOURCE)
+  set(MOONLIGHT_TRAP_SOURCE ${MOONLIGHT_SRC_DIR}/trap_non_vectored.c)
+endif()
+
 set(MOONLIGHT_PLATFORM_SOURCES
   ${THREADX4TGFS_ROOT}/port/picolibc/port.c
   ${MOONLIGHT_SRC_DIR}/bootup.c
   ${MOONLIGHT_SRC_DIR}/board.c
-  ${MOONLIGHT_SRC_DIR}/trap_non_vectored.c
+  ${MOONLIGHT_TRAP_SOURCE}
   ${MOONLIGHT_SRC_DIR}/exception.c
   ${MOONLIGHT_SRC_DIR}/vector_table.c)