Add contract size limits warnings #8249

Job	Run time
scarb-metadata compatibility check	47s
build test linux x86-64	4m 26s
check-rust	14s
check-website	9s
build test windows x86-64	7m 36s
doc tests	3m 23s
test linux x86-64 1/8	21m 39s
test linux x86-64 2/8	25m 31s
test linux x86-64 3/8	20m 41s
test linux x86-64 4/8	17m 55s
test linux x86-64 5/8	15m 7s
test linux x86-64 6/8	16m 7s
test linux x86-64 7/8	12m 18s
test linux x86-64 8/8	15m 3s
test windows x86-64 1/8	20m 13s
test windows x86-64 2/8	23m 9s
test windows x86-64 3/8	20m 12s
test windows x86-64 4/8	16m 8s
test windows x86-64 5/8	16m 26s
test windows x86-64 6/8	15m 5s
test windows x86-64 7/8	12m 16s
test windows x86-64 8/8	14m 20s
	4h 58m 45s

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