SuperResolution: Add documentation #4383

Job	Run time
Linux -> Pre-checks	16s
Linux -> GCC-x64, Release	10m 7s
Linux -> Clang-NO_GLSLANG-x64, Debug	8m 28s
Linux -> Clang-x64, Debug	13m 21s
Linux -> Clang-NO_GLSLANG-NO_HLSL-x64, Release	6m 50s
Linux -> GCC-x64, Debug	12m 31s
Linux -> Clang-x64, Release	12m 55s
	1h 4m 28s

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