Feature request: Public unauthenticated page to push signed validator messages to the network

[uwuforever]

It would be nice to have an unauthenticated page to push signed messages onto the beacon chain P2P network, similar to "pushTx" raw transaction broadcast tools like https://etherscan.io/pushTx, just for validator/beacon chain messages instead of transactions.

This would be useful for users needing to voluntarily exit, set a withdrawal address, request a withdrawal, etc. Instead of requiring an account, it could authenticate requests by simply checking that each signed message is valid.