Merge pull request #645 from danmorris27/docs/fix-client-quickstart-import

docs: include require "mcp" in client quick-start examples

Author: koic

README.md

@@ -93,6 +93,8 @@ see [Server Transports](https://ruby.sdk.modelcontextprotocol.io/server/transpor
 A minimal client spawns a stdio server as a subprocess, connects, and lists and calls its tools:
 
 ```ruby
+require "mcp"
+
 stdio_transport = MCP::Client::Stdio.new(
   command: "bundle",
   args: ["exec", "ruby", "path/to/server.rb"],

docs/index.md

@@ -75,6 +75,8 @@ see [Server Transports](/server/transports/).
 A minimal client spawns a stdio server as a subprocess, connects, and lists and calls its tools:
 
 ```ruby
+require "mcp"
+
 stdio_transport = MCP::Client::Stdio.new(
   command: "bundle",
   args: ["exec", "ruby", "path/to/server.rb"],