[Feature] Add JSON Web Token (JWT) token generation and validation support

[zerosnacks]

Component

transports

Describe the feature you would like

To add JWT claims generation and validation support

Besides having use in Foundry it is a common method of authentication between execution client / consensus client

For reference:

• https://github.com/gakonst/ethers-rs/blob/master/ethers-providers/src/rpc/transports/common.rs
• https://crates.io/crates/tower-jwt

Both implementations use: https://github.com/Keats/jsonwebtoken

Additional context

It is possibly preferred that this is added to a separate new repo in the alloy org

@mattsse indicated that this is also useful for Reth

I should be able to implement it and propose a PR if that is desired

[mattsse]

we should probably put this in the engine types crate

don't think it's worth it to add a new crate for this

here's the reth code

https://github.com/paradigmxyz/reth/blob/9a1d6ea9ca7d6522b7610b65871eb562ff080e67/crates/rpc/rpc/src/layers/jwt_secret.rs#L15-L15

https://github.com/paradigmxyz/reth/blob/9a1d6ea9ca7d6522b7610b65871eb562ff080e67/crates/rpc/rpc/src/layers/jwt_validator.rs#L11-L11

[prestwich]

we should probably put this in the engine types crate

makes sense to me