docs: update the whole repository

* fix some bugs
* delete duplicate files
* format code

DataStructures/Queues/GenericArrayListQueue.java

@@ -1,3 +1,5 @@
+package DataStructures.Queues;
+
 import java.util.ArrayList;
 
 public class GenericArrayListQueue<T> {

DataStructures/Queues/PriorityQueues.java

@@ -1,3 +1,5 @@
+package DataStructures.Queues;
+
 /**
  * This class implements a PriorityQueue.
  * <p>
@@ -6,7 +8,6 @@
  * In this example I give numbers that are bigger, a higher priority.
  * Queues in theory have no fixed size but when using an array
  * implementation it does.
- *
  */
 class PriorityQueue {
     /**

DataStructures/Queues/Queues.java

@@ -1,3 +1,5 @@
+package DataStructures.Queues;
+
 /**
  * This implements Queues by using the class Queue.
  * <p>