feat: add emerynet to network selector

[dckc]

goal:
closes #43

This is evidently not enough - Keplr still asks to confirm that I want to add a network with a localhost rpc.

The RPC address seems to be hard-coded in places such as...

dapp-orchestration-basics/ui/src/components/Orchestration/MakeAccount.tsx

Lines 9 to 12 in 486f4eb

	const rpcEndpoints = {
	osmosis: 'http://127.0.0.1:26655',
	agoric: 'http://127.0.0.1:26657',
	};

cc @LuqiPan

[dckc]

overtaken by #62 . Thanks, @samsiegart