Extracted frontend from webservice to new directory

Updated directory structure
Updated .gitignore

frontend/src/app/Views/header/header.component.html

@@ -0,0 +1,18 @@
+<mat-toolbar>
+  <button
+    mat-icon-button
+    class="example-icon"
+    aria-label="Example icon-button with menu icon"
+  >
+    <mat-icon>menu</mat-icon>
+  </button>
+  <span>Aktienbot</span>
+  <span class="example-spacer"></span>
+  <button
+    mat-icon-button
+    class="example-icon favorite-icon"
+    aria-label="Example icon-button with heart icon"
+  >
+    <mat-icon>settings</mat-icon>
+  </button>
+</mat-toolbar>