Extract ethereum-forks crate

[mattsse]

Describe the feature

ethereum forks crate contains support for various hardforks and forkid checking,

it no longer contains any reth specific dependencies and no alloy/alloy deps

reth/crates/ethereum-forks/Cargo.toml

Lines 15 to 19 in 91dd417

	# ethereum
	alloy-chains.workspace = true
	alloy-primitives = { workspace = true, features = ["serde", "rlp"] }
	alloy-rlp = { workspace = true, features = ["arrayvec", "derive"] }
	once_cell.workspace = true

we can extract this to a standalone crate

Additional context

alloy-rs/eips#24