Feature request: Add WalletConnect Provider

[dievardump]

I've been looking for a way to use "Wallet Connect Standalone Client" with ethers.js

I've stumbled upon #775 which was a very great start, but then it has kind of been abandoned to go with the "dApp provides an infura key" solution.

I would like to know if we could speak again about a specific WalletConnect Provider that would allow dApps to leverage the already existing connection of the Wallet to the blockchain, and not force us to also have an infura key.

-> the connector already allows things like eth_sentdTransaction, eth_signTransaction etc... and should then provide enough api for a WalletConnect Provider to allow to interact with the blockchain through the wallet