feat: feynman base fee

[greged93]

Adds the Feynman L2 base fee computation to Reth and introduces it into the transaction pool.

[codspeed-hq]

CodSpeed Performance Report

Merging #273 will not alter performance

_{Comparing feat/feynman-base-fee (6506202) with scroll (766dd27)}

Summary

✅ 77 untouched benchmarks

[greged93]

This is one of the points that I'm not sure about: should the base fee from the transaction pool be fetched and used here?

For context, this type is used in the RpcConverter and builds a RPC transaction from a recovered tx and the scroll transaction info (which contains the L1 fee and the block context info). For now, afaiu, the RpcConverter uses empty block context for pending pool transaction (see here) but from what I understand in l2geth, the pending base fee is used to compute the effective_gas_price for pool transactions.