Support for Ethereum Beacon Chain Data

First off, I'd like to thank the contributors. This project has been incredibly useful for pulling various blockchains. However, I noticed that while there's an option for sidechains in the configuration, the implementation seems to be missing for sidechains in general. I'm particularly interested in the Ethereum Beacon Chain as its data is becoming increasingly important.

The request is to add support for pulling data from the Ethereum Beacon Chain. This would ideally include the ability to query [Beacon APIs](https://ethereum.github.io/beacon-APIs/#/Beacon), particularly states, headers, blocks and light client APIs.

Thank you for considering this feature request.