Skeleton for part tracking

- Added  list and detail view
- Fixed some links

InvenTree/part/templates/navbar.html

@@ -9,6 +9,7 @@
       <li class="active"><a href="/part/">Parts</a></li>
       <li><a href="/stock/">Stock</a></li>
       <li><a href="/supplier/">Suppliers</a></li>
+      <li><a href="/track/">Tracking</a></li>
     </ul>
   </div>
 </nav>

InvenTree/part/templates/part/cat_link.html

@@ -1,12 +1,12 @@
 <div class='navigation'>
 <nav aria-label="breadcrumb">
   <ol class="breadcrumb">
-    <li class="breadcrumb-item{% if category is None %} active" aria-current="page{% endif %}"><a href="/part/list/">Parts</a></li>
+    <li class="breadcrumb-item{% if category is None %} active" aria-current="page{% endif %}"><a href="/part/">Parts</a></li>
 {% if category %}
 {% for path_item in category.parentpath %}
-    <li class="breadcrumb-item"><a href="/part/list/?category={{ path_item.id }}">{{ path_item.name }}</a></li>
+    <li class="breadcrumb-item"><a href="{% url 'category-detail' path_item.id %}">{{ path_item.name }}</a></li>
 {% endfor %}
-    <li class="breadcrumb-item active" aria-current="page"><a href="/part/list/?category={{ category.id }}">{{ category.name }}</a></li>
+    <li class="breadcrumb-item active" aria-current="page"><a href="{% url 'category-detail' category.id %}">{{ category.name }}</a></li>
 {% endif %}
   </ol>
 </nav>