Use protobufs for packed message data #352

Job	Run time
PhotonClient Build	45s
Build Offline Docs	1m 19s
Build Examples	3m 51s
Gradle Build	4m 28s
Photonlib - Build Docker - Athena	6m 25s
Photonlib - Build Host - Win64	7m 26s
Photonlib - Build Docker - Raspbian	6m 31s
Photonlib - Build Host - macOS	6m 35s
Photonlib - Build Docker - Aarch64	6m 52s
Photonlib - Build Host - Linux	4m 13s
Build fat JAR - Win64	3m 37s
Build fat JAR - macOS	3m 34s
Build fat JAR - Linux	1m 48s
Build fat JAR - macOSArm	4m 29s
Build fat JAR - LinuxArm32	2m 24s
Build fat JAR - LinuxArm64	2m 25s
Build image - ${{ matrix.image_url }}	0s
release	0s
	1h 6m 42s

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