new plugin cms-development (#1591)

* new plugin cms-development

* new plugin cms-development

plugins/cms-development/.github/plugin/plugin.json

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+{
+  "name": "cms-development",
+  "description": "Skills for CMS development across themes, plugins, admin tooling, media workflows, markdown rendering, and static export pipelines.",
+  "version": "1.0.0",
+  "keywords": [
+    "cms",
+    "content-management-system",
+    "wordpress",
+    "shopify",
+    "drupal",
+    "theme",
+    "plugin",
+    "media",
+    "static-site"
+  ],
+  "author": {
+    "name": "Awesome Copilot Community"
+  },
+  "repository": "https://github.com/github/awesome-copilot",
+  "license": "MIT",
+  "skills": [
+    "./skills/content-management-systems/",
+    "./skills/markdown-to-html/",
+    "./skills/quasi-coder/",
+    "./skills/web-coder/"
+  ]
+}

plugins/cms-development/README.md

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+# CMS Development Plugin
+
+Toolkit for content management system development across themes, plugins, admin tooling, media workflows, markdown rendering, and static export pipelines.
+
+## Installation
+
+```bash
+# Using Copilot CLI
+copilot plugin install cms-development@awesome-copilot
+```
+
+## What's Included
+
+### Skills
+
+| Skill | Description |
+|-------|-------------|
+| `content-management-systems` | CMS-specific workflows across platforms such as WordPress, Shopify, Drupal, Webflow, and AEM. Covers themes, plugins, admin panels, content models, media pipelines, and static export. |
+| `markdown-to-html` | Markdown rendering, conversion, and HTML output workflows. |
+| `quasi-coder` | Interpreting web page design descriptions, and implementing code from shorthand, quasi-code, and natural language descriptions. |
+| `web-coder` | Frontend, browser, and HTTP work that CMS tasks commonly rely on. |
+
+## When to Use
+
+Install this plugin when the work centers on any of the following:
+
+- Developing or customizing themes and templates on any CMS platform
+- Building or modifying plugins, apps, modules, or extensions
+- Working on admin or editor interfaces, content forms, or publishing flows
+- Handling media uploads, asset pipelines, or authored file storage
+- Implementing or debugging markdown rendering and content transformation
+- Building static export, deploy, or server-rendered output pipelines
+- Modeling content types, taxonomy, slugs, metadata, or migration schemas
+
+## Source
+
+This plugin is part of [Awesome Copilot](https://github.com/github/awesome-copilot), a community-driven collection of GitHub Copilot extensions.
+
+## License
+
+MIT