feat(react,react-native): add React and React Native plugins to marketplace (#140)

Add two new plugins sourced from Vercel Engineering best practices:
- react: Next.js best practices, view transitions, and composition patterns
- react-native: Expo best practices for performant mobile apps

Update marketplace.json, README, and release-please-config accordingly.

Author: amondnet

.claude-plugin/marketplace.json

@@ -511,6 +511,22 @@
       "keywords": ["next", "nextjs", "react", "ssr", "rsc"],
       "tags": ["framework", "react"],
       "source": "./plugins/next"
+    },
+    {
+      "name": "react",
+      "description": "React and Next.js best practices, view transitions, and composition patterns from Vercel Engineering",
+      "category": "framework",
+      "keywords": ["react", "nextjs", "vercel", "performance", "view-transitions"],
+      "tags": ["framework", "frontend"],
+      "source": "./plugins/react"
+    },
+    {
+      "name": "react-native",
+      "description": "React Native and Expo best practices for building performant mobile apps",
+      "category": "mobile",
+      "keywords": ["react-native", "expo", "mobile", "performance"],
+      "tags": ["framework", "mobile"],
+      "source": "./plugins/react-native"
     }
   ]
 }

README.md

@@ -252,6 +252,16 @@ Next.js best practices, caching patterns, and upgrade guidance.
 
 **Install:** `/plugin install next@pleaseai` | **Source:** [plugins/next](https://github.com/pleaseai/claude-code-plugins/tree/main/plugins/next)
 
+#### React
+React and Next.js best practices, view transitions, and composition patterns from Vercel Engineering.
+
+**Install:** `/plugin install react@pleaseai` | **Source:** [plugins/react](https://github.com/pleaseai/claude-code-plugins/tree/main/plugins/react)
+
+#### React Native
+React Native and Expo best practices for building performant mobile apps.
+
+**Install:** `/plugin install react-native@pleaseai` | **Source:** [plugins/react-native](https://github.com/pleaseai/claude-code-plugins/tree/main/plugins/react-native)
+
 ## Quick Start
 
 The fastest way to get started — install the marketplace and let the plugin recommender auto-detect what you need:
@@ -331,6 +341,9 @@ Once the marketplace is added, install any plugin individually:
 /plugin install docus@pleaseai
 /plugin install wordpress@pleaseai
 /plugin install vinext@pleaseai
+/plugin install next@pleaseai
+/plugin install react@pleaseai
+/plugin install react-native@pleaseai
 ```
 
 ## What Are Claude Code Plugins?