feat(soroban): (U)int 256 support (#1831) (#1832) #47

Job	Run time
Windows	32m 14s
Docs	1s
Linux x86-64	1s
Mac Arm	1s
Container Image	1s
Stdlib	1s
Mac Intel	1s
Linux Arm	0s
Mac Universal Binary	0s
Polkadot Integration test	-1s
Anchor Integration test	-1s
Coverage report	0s
Polkadot Integration test with subxt	-1s
Soroban Integration test	-1s
Solana Integration test	-1s
Visual Code Extension	-1s
	32m 14s

Provide feedback