feat: add Fetch MCP server definition (#39)

* Add Fetch MCP server definition

Reference Fetch MCP server from modelcontextprotocol/servers. Retrieve web
content and convert to markdown. Uses mcp-server-fetch Python package via uvx.

https://claude.ai/code/session_013AxurW8hPAfnUNvik354Xx

* fix: rename server files with transport suffix

- community.fetch.json -> community.fetch-uvx.json (id: community.fetch-uvx)

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/community.fetch-uvx.json

@@ -0,0 +1,53 @@
+{
+  "$schema": "../schemas/server-definition.schema.json",
+  "id": "community.fetch-uvx",
+  "name": "Fetch (uvx)",
+  "alias": "fetch",
+  "description": "Fetch web content and convert it to markdown. Retrieve web pages, extract text content, and access robots.txt files for any URL.",
+  "icon": "https://avatars.githubusercontent.com/u/182288589?v=4",
+  "schema_version": "2.1",
+  "categories": [
+    "search"
+  ],
+  "tags": [
+    "fetch",
+    "web",
+    "scraping",
+    "markdown",
+    "http",
+    "url"
+  ],
+  "transport": {
+    "type": "stdio",
+    "command": "uvx",
+    "args": [
+      "mcp-server-fetch"
+    ],
+    "metadata": {
+      "inputs": []
+    }
+  },
+  "auth": {
+    "type": "none",
+    "instructions": "No authentication required. Fetches public web content."
+  },
+  "contributor": {
+    "name": "Model Context Protocol",
+    "github": "modelcontextprotocol",
+    "url": "https://modelcontextprotocol.io"
+  },
+  "links": {
+    "repository": "https://github.com/modelcontextprotocol/servers",
+    "homepage": "https://modelcontextprotocol.io",
+    "documentation": "https://github.com/modelcontextprotocol/servers/tree/main/src/fetch#readme"
+  },
+  "platforms": [
+    "all"
+  ],
+  "capabilities": {
+    "tools": true,
+    "resources": false,
+    "prompts": false,
+    "read_only_mode": true
+  }
+}