flatbuffers FlatBuffers

apps/system/flatbuffers vendors Google FlatBuffers v23.5.26 and applies flatbuffers.patch. TensorFlow Lite Micro uses the headers to read .tflite model schemas.

Enable CONFIG_SYSTEM_FLATBUFFERS. Include path: apps/system/flatbuffers/flatbuffers/include.

tflite-micro TensorFlow Lite Micro depends on this package.