feat: OTA-Image mit Trailer im Build erzeugen

cmake/run_mkimage.cmake

@@ -0,0 +1,8 @@
+file(READ ${VERSION_HEADER} V)
+string(REGEX MATCH "\"([^\"]*)\"" _m "${V}")
+set(VERSION "${CMAKE_MATCH_1}")
+execute_process(COMMAND python3 ${MKIMAGE} --image ${IMAGE} --device ${DEVICE} --version ${VERSION} --out ${OUT}
+                RESULT_VARIABLE rc)
+if(NOT rc EQUAL 0)
+  message(FATAL_ERROR "nl_mkimage failed (${rc})")
+endif()