File Parser for levels (#18)

Co-authored-by: Debucquoy Anthony (tonitch) <debucquoy.anthony@gmail.com>
Reviewed-on: #18
Reviewed-by: Mat_02 <diletomatteo@gmail.com>

app/src/main/java/school_project/Vec2.java

@@ -1,10 +1,12 @@
 package school_project;
 
+import java.io.Serializable;
+
 /**
  * This is used to represent a position/vector/... any ensemble of 2 elements that have to work together in
  * a plan. This way we can use some basic operations over them.
  */
-public class Vec2 {
+public class Vec2 implements Serializable {
     public int x, y;
 
     public Vec2() {
@@ -16,4 +18,12 @@ public class Vec2 {
         this.x = x;
         this.y = y;
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof Vec2 vec) {
+            return this.x == vec.x && this.y == vec.y;
+        }
+        return false;
+    }
 }