v4.7.6: Expand Bybit API & WebSocket regional routing & docs

What's Changed

• feat(v4.7.6): expand Bybit API & WebSocket regional routing & docs by @tiagosiebler in #570

Details

• REST regional domain corrections and additions
• REST and WebSocket siteId support
• Top-level WebSocket apiRegion, with nested fallback
• Documented regional WebSocket routing
• Automatic Hong Kong headers
• README, quickstart, llms.txt, and examples
• Successful TypeScript, lint, header, and live WebSocket checks

EU, NL, UAE, and bytick intentionally use the global WebSocket stream by design.

Full Changelog: v4.7.5...v4.7.6