Merge pull request #51 from koic/add_migration_path_for_server_transports_std_transport

Add a migration path for `Server::Transports::StdioTransport`

Author: koic

lib/mcp/transports/stdio.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require_relative "../server/transports/stdio_transport"
+
+warn <<~MESSAGE, uplevel: 3
+  Use `require "mcp/server/transports/stdio_transport"` instead of `require "mcp/transports/stdio"`.
+  Also use `MCP::Server::Transports::StdioTransport` instead of `MCP::Transports::StdioTransport`.
+  This API is deprecated and will be removed in a future release.
+MESSAGE
+
+module MCP
+  module Transports
+    StdioTransport = Server::Transports::StdioTransport
+  end
+end