Add Github Action check to make sure template UI is unchanged (#918) #2976

Job	Run time
photonclient-build	1m 3s
Build Examples	4m 6s
photon-build-all	4m 18s
photonclient-check-lint	47s
Photonlib - Build Docker - Athena	12m 10s
wpiformat	19s
Photonlib - Build Host - Win64	12m 12s
Photonlib - Build Docker - Raspbian	13m 16s
photonserver-build-offline-docs	1m 42s
Photonlib - Build Host - Linux	6m 41s
Photonlib - Build Docker - Aarch64	13m 27s
photonserver-check-lint	47s
Build fat JAR - Win64	3m 1s
Build fat JAR - macOS	3m 1s
Build fat JAR - Linux	1m 41s
Build fat JAR - macOSArm	3m 18s
Build fat JAR - LinuxArm32	2m 38s
Build fat JAR - LinuxArm64	3m 1s
Build image - https://api.github.com/repos/photonvision/photon-pi-gen/releases/tags/v2023.1.3_arm64	11m 57s
Build image - https://api.github.com/repos/photonvision/photon-pi-gen/releases/tags/v2023.2.2_limelight-arm64	9m 2s
photon-release	3m 10s
	1h 51m 37s

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