Save calibration data and show preliminary GUI #534

Job	Run time
Gradle Build	3m 37s
PhotonClient Build	45s
Build Offline Docs	32s
Photonlib - Build Docker - Athena	7m 40s
Photonlib - Build Host - Win64	8m 4s
Photonlib - Build Docker - Raspbian	8m 16s
Photonlib - Build Host - macOS	8m 6s
Photonlib - Build Docker - Aarch64	7m 53s
Photonlib - Build Host - Linux	4m 49s
Build Examples	4m 46s
Build fat JAR - ${{ matrix.artifact-name }}	0s
Build image - ${{ matrix.image_url }}	0s
release	0s
	54m 28s

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