controller keymap fix, inventory skeleton

domain/inventory.go

@@ -0,0 +1,15 @@
+package domain
+
+import "game/konstructor/entity"
+
+func (d *Domain) AddToInventory(item *entity.Item) bool {
+	return true
+}
+
+func (d *Domain) RemoveFromInventory(item *entity.Item) bool {
+	return true
+}
+
+func (d *Domain) UseInventoryItem(item *entity.Item) bool {
+	return true
+}