Glamsterdam upgrade non-headliner scoping (Execution Layer)

[frangio]

EIP-8024: Backward compatible SWAPN, DUPN, EXCHANGE

Discussion topic for EIP-8024. This is a fork of EIP-663 without a dependency on EOF. Update Log 2025-09-06: initial proposal to update EIP-663 2025-09-15: decision to fork as new EIP 2025-11-04: updated encode_pair, decode_pair to fix inconsistency between spec and examples

As far as I can tell this is properly linked everywhere (EIP, Forkcast). Let me know if the link is missing somewhere.