Register key bindings in the env with RunControl

lib/uh/wm/env.rb

@@ -13,12 +13,13 @@ module Uh
       def_delegator :logger, :debug, :log_debug
       def_delegator :@output, :print
 
-      attr_reader   :output
+      attr_reader   :output, :keybinds
       attr_accessor :verbose, :debug, :rc_path, :layout_class
 
       def initialize output
         @output   = output
         @rc_path  = RC_PATH
+        @keybinds = {}
       end
 
       def verbose?