Docs for v1.0.0-alpha14

What's Changed

• Update kagent 1.x reference docs at v1.0.0-alpha13 (version conrefs changed) by @github-actions[bot] in #603
• Derive runtime metrics from invocation spans by @Rachael-Graham in #602
• Clarify ModelConfig rejection behavior by @Rachael-Graham in #604
• Revert npm-minor-patch group bump (#599) to restore kagent.dev by @Rachael-Graham in #605
• Rework harness and agent concepts by @Rachael-Graham in #607
• Skills and MCP wording cleanup by @Rachael-Graham in #608
• Feedback - Examples section by @Rachael-Graham in #609
• Ubuntu 26 prep changes by @kristin-kronstain-brown in #610
• Update observability docs by @Rachael-Graham in #611

Full Changelog: v1.0.0-alpha13...v1.0.0-alpha14