Connect to eth node via http proxy

[leeeddin]

Is your feature request related to a problem? Please describe.
yes, I would like to connect to a rpc via http proxy, as far as I know only web3.js and ethers@6 have this feature for now. Is there any chance ethers-rs can implement this feature？

Describe the solution you'd like
Add an option to provider instance, which includes http proxy info(ip port cred...)