Complete refactoring of part sidebar

InvenTree/templates/sidebar_toggle.html

@@ -0,0 +1,3 @@
+<a href="#" id='sidebar-toggle' class="list-group-item sidebar-list-group-item border-end-0 d-inline-block text-truncate sidebar-toggle" data-bs-parent="#sidebar">
+    <i class="bi bi-bootstrap"></i><span id='sidebar-toggle-icon' class='sidebar-item-icon fas fa-chevron-left'></span>
+</a>