fix(eip-1193): make eth_getTransactionReceipt non-blocking

[Alicepoltora]

Summary

• issue a single eth_getTransactionReceipt JSON-RPC request instead of waiting for a mined transaction
• preserve the standard null result for pending or unknown transactions
• add regression coverage for both mined and pending receipt responses

Root cause and impact

EIP1193Provider delegated eth_getTransactionReceipt to viem's waitForTransactionReceipt. That action polls until a receipt is available and has a default timeout, while the JSON-RPC method is a one-shot lookup that must return null when no receipt exists yet. As a result, callers could block until the polling timeout for pending or unknown transaction hashes.

Testing

• jest --runInBand (60 suites, 302 tests)
• tsc --project tsconfig.json --pretty --noEmit
• eslint on the changed source, test, and mock files