docs(mcp): add list_secrets and list_packages to MCP tools

Updates README with documentation for new list_secrets and list_packages MCP tools. Adds example queries showing how to use these tools with Claude.

README.md

@@ -56,6 +56,9 @@ Ask Claude things like:
 - "What assets are in the v0.3.6 release?"
 - "Are there any known solutions for NETSDK1147?"
 - "Diagnose why job 456 failed"
+- "What secrets are available for myorg/myrepo?"
+- "List all NuGet packages for myorg"
+- "What global packages are available?"
 
 ## Available Tools
 
@@ -70,6 +73,8 @@ Ask Claude things like:
 | `get_job_logs` | Get logs from a specific job |
 | `list_releases` | List releases for a repository |
 | `get_release` | Get release details with all assets |
+| `list_secrets` | List secret names and descriptions (not values) for global, org, and repo scopes |
+| `list_packages` | List packages for an owner or globally with version and visibility info |
 
 ### AI Learning Tools