Add include field to the manifest #8146

Job	Run time
build test linux x86-64	3m 51s
check-rust	4m 2s
build test windows x86-64	9m 7s
check-website	16s
scarb-metadata compatibility check	41s
doc tests	3m 7s
test linux x86-64 1/8	22m 14s
test linux x86-64 2/8	24m 35s
test linux x86-64 3/8	21m 24s
test linux x86-64 4/8	17m 26s
test linux x86-64 5/8	16m 12s
test linux x86-64 6/8	14m 17s
test linux x86-64 7/8	11m 49s
test linux x86-64 8/8	14m 41s
test windows x86-64 1/8	20m 52s
test windows x86-64 2/8	22m 27s
test windows x86-64 3/8	21m 22s
test windows x86-64 4/8	15m 47s
test windows x86-64 5/8	16m 55s
test windows x86-64 6/8	13m 15s
test windows x86-64 7/8	11m 40s
test windows x86-64 8/8	13m 58s
	4h 59m 58s

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