To get you started, we added this basic `Web3Provider` which assumes an injected provider (like MetaMask), and will ask for user permissions automatically on first mount.
Also provides a `useWeb3` helper hook to access its context values from any component.
We suggest you replace this provider with a more complete solution, since there are many UX considerations not handled in that basic provider, like activate only on user intent, listen for account & network changes, display connection instructions and errors, etc.