feat: add `abigen!` macro #165

Job	Run time
Build starknet-ff features	1m 22s
Build starknet-curve features	1m 1s
Build starknet-crypto-codegen features	53s
Build starknet-crypto features	1m 9s
Build starknet-core features	2m 20s
Build starknet-providers features	2m 4s
Build starknet-signers features	1m 33s
Build starknet-accounts features	2m 20s
Build starknet-contract features	2m 30s
Build starknet-macros features	1m 44s
Build starknet features	3m 46s
	20m 42s

Provide feedback