Check that Solidity frontend libraries can be used to build a frontend for an ink! contract with Solidity ABI

[cmichi]

We need to verify that typical frontend libraries for building dApps with Solidity work with an ink! contract that supports the Solidity ABI.

So it should be possible to build the frontend for a contract that uses #[ink::contract(abi = sol)] (or #[ink::contract(abi = all)]) with e.g. Web3.js. I'm not sure what the current en-vogue libraries are for that. Basically our polkadot-js/api or papi.