Add entity

Author: MatheusRich

lib/ruby_snake/entity.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module RubySnake
+  module Entity
+    def update(_dt, _key)
+      raise NotImplementedError, "#{self.class} should implement `#update(dt, key)`"
+    end
+
+    def draw(_canvas)
+      raise NotImplementedError, "#{self.class} should implement `#draw(canvas)`"
+    end
+  end
+end