- Add configurable request timeouts (request_timeout, receive_timeout,
  pool_timeout, connect_timeout) to fix timeout issues when connecting
  from distant regions (e.g., EU to Apple's US APNS servers)
- Add modern purple logo to README and HexDocs
- Update README with timeout configuration section and troubleshooting
- Add 10 new tests for timeout configuration options
- Total test count: 215 tests