fix: Add required ./ prefix to commands and skills paths in plugin.json

The Claude Code plugin validation requires paths to start with './'
This fixes the manifest validation error that prevented the plugin from loading.

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

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

Author: rand

.claude-plugin/plugin.json

@@ -39,6 +39,6 @@
     "dspy",
     "context-efficient"
   ],
-  "commands": "commands",
-  "skills": "skills"
+  "commands": "./commands",
+  "skills": "./skills"
 }