Added the navbar

Added the navbar as in the figma design file

src/main/java/com/idatt2003/fractalexplorer/GUI/components/FractalView.java

+package com.idatt2003.fractalexplorer.GUI.components;
+
+import javafx.scene.canvas.Canvas;
+
+public class FractalView extends Canvas {
+    public FractalView() {
+        super();
+
+
+    }
+}