feat: add logPrefix option to SorokitClientConfig

[gitGolf]

Summary

Adds an optional field to that allows consumers to customize the log prefix used by the console logger. This enables distinguishing between multiple client instances (e.g., testnet vs mainnet) in debug logs.

Changes

• Added to interface
• Updated to accept an optional parameter
• Modified to pass the prefix to
• Updated to pass through to the logger
• Added tests for custom prefix in logger and client integration

Usage

const client = createSorokitClient({
  network: 'testnet',
  debug: true,
  logPrefix: '[app:testnet]'
});
// Logs will now show [app:testnet] instead of [sorokit]

Test Results

All logger tests pass with the new prefix functionality.

Closes #257

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[Just-Bamford]

@gitGolf welldone, kindly pass the CI tests and resolve the conflict