Fix marketplace.json: add owner field, fix source paths

.claude-plugin/marketplace.json

@@ -1,18 +1,30 @@
 {
   "name": "ki-brain-plugins",
-  "description": "Claude Code plugins by ki-brain: n8n workflow automation and document conversion",
+  "owner": {
+    "name": "ki-brain",
+    "email": "martina@veser.org"
+  },
+  "metadata": {
+    "description": "Claude Code plugins by ki-brain: n8n workflow automation and document conversion"
+  },
   "plugins": [
     {
       "name": "n8n-skills",
-      "source": "n8n-skills",
+      "source": "./n8n-skills",
       "description": "Complete n8n workflow automation skills (7 skills: Code JS/Python, Expressions, Patterns, Validation, Config, MCP Tools)",
-      "version": "1.0.0"
+      "version": "1.0.0",
+      "author": {
+        "name": "ki-brain"
+      }
     },
     {
       "name": "doc-converter",
-      "source": "doc-converter",
+      "source": "./doc-converter",
       "description": "Expert guidance for DOCX/PDF to HTML conversion via Gemini Vision API",
-      "version": "1.0.0"
+      "version": "1.0.0",
+      "author": {
+        "name": "ki-brain"
+      }
     }
   ]
 }