Complete documentation integration with test structure analysis link

Adds link to comprehensive test structure documentation in main README.md,
finalizing the progressive disclosure strategy for project documentation.
This completes the documentation integration work that includes:
- Architecture documentation
- API reference documentation
- Contributing guidelines
- Detailed test analysis

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.local.json

@@ -20,7 +20,9 @@
       "Bash(mv:*)",
       "mcp__memory__read_graph",
       "mcp__memory__search_nodes",
-      "Bash(ls:*)"
+      "Bash(ls:*)",
+      "Bash(git add:*)",
+      "Bash(git restore:*)"
     ],
     "deny": []
   },