Release v1.2.0

What's Changed

• [codex] fix doc sample snippets by @fa-yoshinobu in #14
• [codex] Improve sample navigation and reconnect examples by @fa-yoshinobu in #15
• [codex] Link Rust API documentation by @fa-yoshinobu in #16
• [codex] Add operational polling recipes by @fa-yoshinobu in #17
• [codex] Document Rust operational recipes by @fa-yoshinobu in #18

Full Changelog: v1.1.1...v1.2.0