Add .claude-plugin/marketplace.json for plugin distribution

This enables users to install the `mcp-apps` plugin via:

    /plugin marketplace add modelcontextprotocol/ext-apps
    /plugin install mcp-apps@modelcontextprotocol-ext-apps

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/mcp-apps/.claude-plugin/plugin.json

@@ -5,7 +5,7 @@
   "author": {
     "name": "MCP Apps"
   },
-  "repository": "https://github.com/anthropics/mcp-ext-apps",
+  "repository": "https://github.com/modelcontextprotocol/ext-apps",
   "license": "MIT",
   "keywords": ["mcp", "mcp-apps", "model-context-protocol", "ui", "interactive"]
 }

plugins/mcp-apps/README.md

@@ -6,9 +6,10 @@ A Claude Code plugin that provides the "Create MCP App" skill for building MCP A
 
 Install via Claude Code:
 
-1. Run `/plugin` in Claude Code
-2. Navigate to the Discover tab
-3. Install "mcp-apps"
+```
+/plugin marketplace add modelcontextprotocol/ext-apps
+/plugin install mcp-apps@modelcontextprotocol-ext-apps
+```
 
 ## Usage