feat: add Shopify Dev MCP server definition (#73)

* Add Shopify Dev MCP server definition

Official Shopify Dev MCP server for searching developer documentation, learning
about APIs, and validating Liquid themes. No API key required.

https://claude.ai/code/session_013AxurW8hPAfnUNvik354Xx

* fix: update Shopify documentation URL

* fix: rename server files with transport suffix

- com.shopify-dev-mcp.json -> com.shopify-dev-mcp-npx.json (id: com.shopify-dev-mcp-npx)

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

---------

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

Author: its-mash

servers/com.shopify-dev-mcp-npx.json

@@ -0,0 +1,55 @@
+{
+  "$schema": "../schemas/server-definition.schema.json",
+  "id": "com.shopify-dev-mcp-npx",
+  "name": "Shopify Dev (npx)",
+  "alias": "shopify",
+  "description": "Search Shopify developer documentation, learn about APIs, fetch full docs, and validate Liquid themes. No API key required.",
+  "icon": "https://avatars.githubusercontent.com/u/8085?v=4",
+  "schema_version": "2.1",
+  "categories": [
+    "developer-tools",
+    "documentation"
+  ],
+  "tags": [
+    "shopify",
+    "e-commerce",
+    "api",
+    "documentation",
+    "themes",
+    "liquid"
+  ],
+  "transport": {
+    "type": "stdio",
+    "command": "npx",
+    "args": [
+      "-y",
+      "@shopify/dev-mcp@latest"
+    ],
+    "metadata": {
+      "inputs": []
+    }
+  },
+  "auth": {
+    "type": "none",
+    "instructions": "No API key required. This server provides access to Shopify developer documentation and theme validation tools."
+  },
+  "contributor": {
+    "name": "Shopify",
+    "github": "Shopify",
+    "url": "https://shopify.dev"
+  },
+  "links": {
+    "repository": "https://github.com/Shopify/dev-mcp",
+    "homepage": "https://shopify.dev",
+    "documentation": "https://shopify.dev/docs/apps/build/devmcp"
+  },
+  "platforms": [
+    "all"
+  ],
+  "capabilities": {
+    "tools": true,
+    "resources": false,
+    "prompts": false,
+    "read_only_mode": true
+  }
+}