Added initial tools support, minor refactor to sidebar actions

lib/tool.rb

@@ -0,0 +1,49 @@
+class IMICRTS
+  class Tool
+    @@tools = {}
+    def self.get(tool)
+      @@tools.dig(tool)
+    end
+
+    def self.inherited(subclass)
+      @@tools[subclass.to_s.to_snakecase] = subclass
+    end
+
+    attr_reader :game, :director, :player
+    def initialize(options = {}, game: nil, director: nil, player: nil)
+      @options = options
+      @game = game
+      @director = director
+      @player = player
+
+      setup
+    end
+
+    def setup
+    end
+
+    def draw
+    end
+
+    def update
+    end
+
+    def button_down(id)
+    end
+
+    def button_up(id)
+    end
+
+    def cost
+      return 0
+    end
+
+    def cancel_tool
+      @game.set_tool(nil)
+    end
+  end
+end
+
+Dir.glob("#{IMICRTS::GAME_ROOT_PATH}/lib/tools/**/*.rb").each do |tool|
+  require_relative tool
+end