Introduce Env to manage CLI env and config

lib/uh/wm/env.rb

@@ -0,0 +1,22 @@
+require 'logger'
+
+module Uh
+  module WM
+    class Env
+      attr_reader :output, :logger
+
+      def initialize output, logger_: Logger.new(output)
+        @output = output
+        @logger = logger_
+      end
+
+      def log message
+        logger.info message
+      end
+
+      def print message
+        @output.print message
+      end
+    end
+  end
+end