docs: add MCP client configuration to example READMEs

Add stdio transport configuration snippets near the top of each example
README to help users quickly set up the servers in their MCP clients.

- Node.js examples use npx with the published npm packages
- Python qr-server uses uv with local path
- Removed Claude Desktop-specific references from qr-server

examples/qr-server/README.md

@@ -4,12 +4,27 @@ A minimal Python MCP server that generates customizable QR codes with an interac
 
 ![Screenshot](https://modelcontextprotocol.github.io/ext-apps/screenshots/qr-server/screenshot.png)
 
+## MCP Client Configuration
+
+Add to your MCP client configuration (stdio transport):
+
+```json
+{
+  "mcpServers": {
+    "qr": {
+      "command": "uv",
+      "args": ["run", "/path/to/qr-server/server.py", "--stdio"]
+    }
+  }
+}
+```
+
 ## Features
 
 - Generate QR codes from any text or URL
 - Customizable colors, size, and error correction
 - Interactive widget that displays in MCP-UI enabled clients
-- Supports both HTTP (for web clients) and stdio (for Claude Desktop)
+- Supports both HTTP (for web clients) and stdio (for MCP clients)
 
 ## Prerequisites
 
@@ -41,24 +56,13 @@ Connect from basic-host:
 SERVERS='["http://localhost:3108/mcp"]' bun serve.ts
 ```
 
-### Stdio Mode (for Claude Desktop)
+### Stdio Mode (for MCP clients)
 
 ```bash
 uv run server.py --stdio
 ```
 
-Add to Claude Desktop config (`~/Library/Application Support/Claude/claude_desktop_config.json`):
-
-```json
-{
-  "mcpServers": {
-    "qr": {
-      "command": "uv",
-      "args": ["run", "/path/to/qr-server/server.py", "--stdio"]
-    }
-  }
-}
-```
+See [MCP Client Configuration](#mcp-client-configuration) above for how to add this server to your MCP client.
 
 ### Docker (accessing host server from container)