Get contracts to compile, add viem.sh, and create examples for it

[haydenshively]

@aneesh1, intention here is not necessarily to merge, but just to give you something to look at when migrating your code to viem. You can copy/paste the typescript ABIs to replace the JSONs, but aside from that this is really just a bare-bones example.

Some neat features of viem that you'll be able to take advantage of (off the top of my head):

• built-in multicall
• built-in polling to enable watching events even without a websocket connection
• better quorums/fallbacks than ethers
• transaction .estimateGas, .write and .simulate (probably won't need .simulate, but it's nice to have)

It also picks up types from the ABIs for better IDE integration and uses native bigint instead of BigNumber, so dev experience is significantly better.