wiki: add OS-Compatibility page + v1.1.1 changelog entry
- New OS-Compatibility.md (mirrors claude-ops/docs/os-compatibility.md
shipped in PR #100): support matrix, install commands per channel,
credential cascade explainer, daemon registration, browser profiles,
URL opener, dev/CI guidance, known limitations.
- _Sidebar.md: linked OS Compatibility under Reference; bumped version
badge from v1.1.0 to v1.1.1.
- Changelog.md: new v1.1.1 section covering #100 (docs) and #101
(gog cleanup + Darwin guards + test detector hardening). Updated
release-timeline mermaid + the badge counts at the top.
- Home.md: bumped version badge.
Mirrors CHANGELOG.md and README.md updates from PR #102.
https://claude.ai/code/session_01SappBC7MZ7ZvENGQgq2rZy