feat: implement precompile contract for opBNB #4

Job	Run time
test stable --no-default-features	56s
test stable	1m 11s
test stable --all-features	1m 34s
check serde	51s
check no-default-features	53s
test beta --no-default-features	1m 1s
test beta	1m 6s
test beta --all-features	1m 32s
check std	49s
clippy	1m 7s
test nightly --no-default-features	1m 6s
test nightly	1m 1s
test nightly --all-features	1m 29s
fmt	13s
docs	1m 24s
test no_std	16s
	16m 29s

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