New icons (#2658)

# Description

Updates some icons on the navbar
Closes #()

![image](https://github.com/user-attachments/assets/d88ff4f3-c092-46f9-980a-999e92aeb146)

## Checklist

- [x ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x ] I have performed a self-review of my own code
- [ x] I have attached images of the change if it is UI based
- [ x] I have commented my code, particularly in hard-to-understand
areas
- [ x] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [ x] My changes generate no new warnings
- [ x] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

---------

Co-authored-by: Reece Browne <reece@stirling.pdf>

src/main/resources/templates/fragments/navbarEntryCustom.html

@@ -0,0 +1,13 @@
+<th:block th:fragment="navbarEntry(endpoint, toolIcon, titleKey, descKey, tagKey, toolGroup)"
+  th:if="${@endpointConfiguration.isEndpointEnabled(endpoint)}">
+  <a class="dropdown-item" href="#" th:href="@{${endpoint}}"
+    th:classappend="${endpoint.equals(currentPage)} ?  ${toolGroup} + ' active' : '' + ${toolGroup}"
+    th:title="#{${descKey}}" th:data-bs-tags="#{${tagKey}}">
+    <div class="icon" alt="icon" th:class="@{${toolGroup}}">
+      <svg class="nav-icon" style="height: 2.5rem; width:2.5rem">
+        <use th:xlink:href="@{${toolIcon}}"></use>
+      </svg>
+      <span class="icon-text" th:text="#{${titleKey}}"></span>
+    </div>
+  </a>
+</th:block>