Parsing and support for meta-contracts and contracts #626

Job	Run time
ghidra-script-tests (22.04)	18m 2s
llvm-build-and-test (20, 22.04, Debug, OFF)	21m 10s
llvm-build-and-test (20, 22.04, Release, OFF)	17m 48s
	57m 0s

Provide feedback