Consolidate docs nav to 4 tabs: Home, API Reference, Guides, Reference

Guides: Examples, Hosting, Access Log, Conformance Testing
Reference: Benchmarks, Comparison, Contributing

Fewer top-level tabs, every page has sidebar companions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: rustyconover

mkdocs.yml

@@ -131,9 +131,9 @@ nav:
   - Guides:
     - Examples: examples.md
     - Hosting: hosting.md
-  - Operations:
     - Access Log: access-log.md
     - Conformance Testing: cross-language-conformance.md
-  - Benchmarks: benchmarks.md
-  - Comparison: comparison.md
-  - Contributing: contributing.md
+  - Reference:
+    - Benchmarks: benchmarks.md
+    - Comparison: comparison.md
+    - Contributing: contributing.md