Add a detection search for the navbar

Signed-off-by: ziad hany <ziadhany2016@gmail.com>

Author: ziadhany

vulnerabilities/templates/navbar.html

@@ -29,6 +29,9 @@
             <a class="navbar-item {% active_item 'package_search_v2' %}" href="{% url 'package_search_v2' %}">
                 V2
             </a>
+            <a class="navbar-item {% active_item 'detection_rule_search' %}" href="{% url 'detection_rule_search' %}">
+                Detection Rules
+            </a>
             <a class="navbar-item" href="https://vulnerablecode.readthedocs.io/en/latest/" target="_blank">
                 Documentation
             </a>