C++

Add a first example for the new Dlib layers to build a transform-type… #1347

Job	Run time
ubuntu-20_04-gcc-7	27m 21s
ubuntu-22-04-ffmpeg7	1m 14s
ubuntu-22-04-gcc-default-cmake-3-8-ffmpeg5	26m 58s
ubuntu-latest-clang-default-avx	16m 0s
ubuntu-latest-gcc-11-blas	15m 37s
windows-latest	27m 36s
windows-2019	15m 22s
	2h 10m 8s

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