Add tasks for all the new languages

Task/Arrays/Apex/arrays-1.apex

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+Integer[] array = new Integer[10]; // optionally, append a braced list of Integers like "{1, 2, 3}"
+array[0] = 42;
+System.debug(array[0]); // Prints 42

Task/Arrays/Apex/arrays-2.apex

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+List <Integer> aList = new List <Integer>(); // optionally add an initial size as an argument
+aList.add(5);// appends to the end of the list
+aList.add(1, 6);// assigns the element at index 1
+System.debug(list[0]); // Prints 5, alternatively you can use list.get(0)