Add Help Command instructions

The previous iteration contained the functionality for the help
command but did not mention it specifically.

I change the Ui Class to include the help function explicitly.

src/main/java/duke/Parser.java

@@ -207,7 +207,6 @@ public static String parseText(String cmd, TaskList tl, Storage store)
                 break;
             }
 
-
             finalOutput = ui.removedAllTaskScreen();
             break;
 

src/main/java/duke/Storage.java

@@ -106,6 +106,11 @@ public void taskListToFile(TaskList tl)
     }
 
 
+    /**
+     * Returns the File object contained inside the Storage Object.
+     *
+     * @return The File Object
+     */
     public File getFile() {
         return this.file;
     }

src/main/java/duke/Task.java

@@ -22,9 +22,9 @@ public class Task {
         this.name = name;
     }
 
-    /*
-     * Create a duke.Task object with default false
-     * done status
+    /**
+     * Create a Task object with default false
+     * done status.
      */
     Task(String name) {
         this(false, name);

src/main/java/duke/Ui.java

@@ -1,12 +1,14 @@
 package duke;
 
 /**
- * The UI Class deals with the App's User Interface, inclusive of but not limited to
- * System.out formatting, line formatting, and other output formatting.
+ * The UI Class deals with the App's Graphical User Interface, inclusive of but
+ * not limited to String formatting, line formatting, error string formatting, a
+ * and other output formatting.
  */
 public class Ui {
     private static final String TABS_SPACING = "_________________________";
     private static final String WHITE_SPACING = "      ";
+
     /** Default constructor */
     public Ui() {}
 
@@ -75,6 +77,8 @@ public String startScreen() {
                 + "\n"
                 + this.tabPrinter("list")
                 + "\n"
+                + this.tabPrinter("help")
+                + "\n"
                 + this.tabPrinter("mark/unmark/delete <INDEX>")
                 + "\n"
                 + this.linePrinter();