Expand ERC-8004 chain support to all 8004scan networks

[a6b8]

Update Erc8004Lookup to support all 16 chains from 8004scan.io:

• Replace per-chain CONTRACTS map with dedicated IDENTITY_REGISTRY and REPUTATION_REGISTRY addresses
• Add 12 new chains: Optimism, BNB, Gnosis, Polygon, Monad, XLayer, Arbitrum, Celo, Avalanche, Linea, Taiko, Scroll
• Fix reputation queries to use separate Reputation Registry (0x8004BA...)
• Source: https://www.8004scan.io/networks