feat(HTML): create element with class computation-history

Author: josueJURE

index.html

@@ -33,7 +33,8 @@
             <div data-value="history" class="history-btn">history</div>
             <div data-value="(" data-operator  class="child operator">(</div>
             <div data-value=")" data-operator  class="child operator">)</div>
-            
+        </div>
+        <div class="computation-history">
 
         </div>