WIP: Implement UltralightProvider Enhancements for EIP-1193 JSON-RPC Support

[cjustinobi]

Key Enhancements:

1. EIP-1193 Method Support:

   • Implements commonly used Ethereum JSON-RPC methods:
     • eth_getBlockByHash
     • eth_getBlockByNumber
     • eth_getTransactionCount
     • eth_getCode
     • eth_getBalance
     • eth_getStorageAt
     • eth_call

2. Error Handling:

   • Adds robust error codes and messages based on JSON-RPC specifications:
     • 4200 for unsupported methods.
     • -32602 for invalid parameters.
     • -32603 for internal errors.

3. Removed unused methods from provider.spec.ts