Adding char E to 3d-diagonal (#1200)

Author: nakul-py

Fonts/3d-diagonal/3d-diagonal.h

@@ -67,16 +67,28 @@ class ThreeD_Diagonal : public Fonts
         }
     */
 
-    /*
+    
         vs E()
         {
-            vs character = getCharGrid();
+            vs character = getCharGrid(13, 13);
 
-            //Enter the character grid in ROWS X COLS
+            character[0] = "     ,---,.   "; 
+            character[1] = "   ,'  .' |   "; 
+            character[2] = " ,---.'   |   "; 
+            character[3] = " |   |   .'   ";
+            character[4] = " :   :  |-,   ";
+            character[5] = " :   |  ;/|   ";
+            character[6] = " |   :   .'   ";
+            character[7] = " |   |  |-,   ";
+            character[8] = " '   :  ;/|   "; 
+            character[9] = " |   |    \\  ";
+            character[10]= " |   :   .'   ";
+            character[11]= " |   | ,'     ";
+            character[12]= " `----'       ";
 
             return character;
         }
-    */
+    
 
     /*
         vs F()