feat(chains): add OrdoFi public RPC and WebSocket to Robinhood Chain - #5093

Description

Adds a second public HTTP RPC and the first WebSocket RPC to the robinhood chain definition (4663).

• https://rpc.ordofi.network: public, no key, listed in ethereum-lists/chains and on ChainList. Served from nodes in the US and Frankfurt behind one hostname; transactions are simulated before submission and delivered directly to the sequencer.
• wss://rpc.ordofi.network: eth_subscribe (newHeads, logs) and full JSON-RPC on the same socket. The chain's official RPC is HTTP-only, so this gives viem's webSocket() transport and watchBlocks a native subscription on Robinhood Chain instead of polling.

The official RPC stays first in http.

curl -s https://rpc.ordofi.network -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}'
{"jsonrpc":"2.0","id":1,"result":"0x1237"}

Checklist

• Changeset added
• Public RPC, no API key

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