Use protobufs for packed message data #280

Job	Run time
PhotonClient Build	40s
Gradle Build	4m 42s
Build Offline Docs	44s
Build Examples	4m 5s
Photonlib - Build Docker - Athena	6m 8s
Photonlib - Build Host - Win64	4m 42s
Photonlib - Build Docker - Raspbian	2m 12s
Photonlib - Build Host - macOS	5m 52s
Photonlib - Build Docker - Aarch64	2m 14s
Photonlib - Build Host - Linux	4m 14s
Build fat JAR - Win64	3m 23s
Build fat JAR - macOS	4m 17s
Build fat JAR - Linux	1m 43s
Build fat JAR - macOSArm	3m 46s
Build fat JAR - LinuxArm32	2m 35s
Build fat JAR - LinuxArm64	1m 39s
Build image - ${{ matrix.image_url }}	0s
release	0s
	52m 56s

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