fix: restructure plugin manifest for Cowork marketplace compatibility

- Add $schema to marketplace.json (matches official Anthropic format)
- Add strict: false to marketplace entry so marketplace is authority
- Remove component declarations (agents, skills) from plugin.json to
  avoid "conflicting manifests" error — auto-discovery handles these
- Add version, author email to marketplace plugin entry
- Passes `claude plugin validate .` with no warnings

.claude-plugin/marketplace.json

@@ -1,5 +1,7 @@
 {
+  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
   "name": "everything-claude-code",
+  "description": "Battle-tested Claude Code configurations from an Anthropic hackathon winner — agents, skills, hooks, commands, and rules evolved over 10+ months of intensive daily use",
   "owner": {
     "name": "Affaan Mustafa",
     "email": "me@affaanmustafa.com"
@@ -11,9 +13,11 @@
     {
       "name": "everything-claude-code",
       "source": "./",
-      "description": "Complete collection of agents, skills, hooks, commands, and rules evolved over 10+ months of intensive daily use",
+      "description": "The most comprehensive Claude Code plugin — 13+ agents, 48+ skills, 32+ commands, and production-ready hooks for TDD, security scanning, code review, and continuous learning",
+      "version": "1.6.0",
       "author": {
-        "name": "Affaan Mustafa"
+        "name": "Affaan Mustafa",
+        "email": "me@affaanmustafa.com"
       },
       "homepage": "https://github.com/affaan-m/everything-claude-code",
       "repository": "https://github.com/affaan-m/everything-claude-code",
@@ -38,7 +42,8 @@
         "code-review",
         "security",
         "best-practices"
-      ]
+      ],
+      "strict": false
     }
   ]
 }