Implement basic game design and weapons. Add menu and inventory(shop)

Java-Knight/src/main/java/org/project/entity/Entity.java

@@ -1,8 +1,6 @@
 package org.project.entity;
 
 public interface Entity {
-    void attack(Entity target);
-
     void defend();
 
     void heal(int health);
@@ -11,10 +9,18 @@ public interface Entity {
 
     void takeDamage(int damage);
 
+    void reduceMana(int mana);
+
     int getMaxHP();
 
     int getMaxMP();
 
+    String getType();
+
+    int getHealManaCost();
+    int getDefendManaCost();
+    void skipNextTurn();
+    void skipTurn();
     /*
     TODO: ADD OTHER REQUIRED AND BONUS METHODS
     */