Add expo plugin to official marketplace

Promotes expo from community to official. Uses git-subdir source
(expo/skills @ plugins/expo, ref main) without a SHA pin so it
tracks upstream. Description cleaned to remove the reviewer-note
preamble that leaked into the community entry.

Ref: DIR-77, DIR-79

.claude-plugin/marketplace.json

@@ -147,17 +147,6 @@
       },
       "homepage": "https://github.com/awslabs/agent-plugins"
     },
-    {
-      "name": "box",
-      "description": "Work with your Box content directly from Claude Code — search files, organize folders, collaborate with your team, and use Box AI to answer questions, summarize documents, and extract data without leaving your workflow.",
-      "category": "productivity",
-      "source": {
-        "source": "url",
-        "url": "https://github.com/box/box-for-ai.git",
-        "sha": "6f4ec3549f3e869b115628403555b1c9220b2b34"
-      },
-      "homepage": "https://github.com/box/box-for-ai"
-    },
     {
       "name": "brightdata-plugin",
       "description": "Web scraping, Google search, structured data extraction, and MCP server integration powered by Bright Data. Includes 7 skills: scrape any webpage as markdown (with bot detection/CAPTCHA bypass), search Google with structured JSON results, extract data from 40+ websites (Amazon, LinkedIn, Instagram, TikTok, YouTube, and more), orchestrate Bright Data's 60+ MCP tools, built-in best practices for Web Unlocker, SERP API, Web Scraper API, and Browser API, Python SDK best practices for the brightda...",
@@ -168,17 +157,6 @@
       },
       "homepage": "https://docs.brightdata.com"
     },
-    {
-      "name": "cds-mcp",
-      "description": "AI-assisted development of SAP Cloud Application Programming Model (CAP) projects. Search CDS models and CAP documentation.",
-      "category": "development",
-      "source": {
-        "source": "url",
-        "url": "https://github.com/cap-js/mcp-server.git",
-        "sha": "4d59d7070a52761a9b8028cbe710c8d7477cbc92"
-      },
-      "homepage": "https://cap.cloud.sap/"
-    },
     {
       "name": "chrome-devtools-mcp",
       "description": "Control and inspect a live Chrome browser from your coding agent. Record performance traces, analyze network requests, check console messages with source-mapped stack traces, and automate browser actions with Puppeteer.",
@@ -1487,16 +1465,6 @@
         "sha": "b93007e9a726c6ee93c57a949e732744ef5acbfd"
       },
       "homepage": "https://github.com/zapier/zapier-mcp/tree/main/plugins/zapier"
-    },
-    {
-      "name": "zoom-plugin",
-      "description": "Claude plugin for planning, building, and debugging Zoom integrations across REST APIs, SDKs, webhooks, bots, and MCP workflows.",
-      "category": "development",
-      "source": {
-        "source": "url",
-        "url": "https://github.com/zoom/zoom-plugin.git"
-      },
-      "homepage": "https://developers.zoom.us/"
     }
   ]
 }