controller keymap fix, inventory skeleton

konstructor/engine/engine.inventory.go

@@ -0,0 +1,15 @@
+package engine
+
+import "game/konstructor/entity"
+
+func (e *Engine) AddToInventory(item *entity.Item) {
+	e.Domain.AddToInventory(item)
+}
+
+func (e *Engine) RemoveFromInventory(item *entity.Item) {
+	e.Domain.RemoveFromInventory(item)
+}
+
+func (e *Engine) UseInventoryItem(item *entity.Item) {
+	e.Domain.UseInventoryItem(item)
+}