Add document splitting functionality to the multi-tools page (#1808)

* Add a split button on top of the insert button in multitool viewer.

* Add placeholder splitFileButtonCallback method.

* Remove unused splitFileButtonContainer element.

* Add this binding to setActions for splitFileButtonCallback

* Add test log for adding separators.

* Add test log for adding separators.

* Remove test logs and add visual indicators to separators instead.

* Add splitting functionality to multi-tools.

* Prevent trying to split from index 0.

* Hide the split button for the first page to avoid confusion.

* Change the class name 'cutBefore' to 'split-before' to fall mroe in line with already existing classes.

* Add dummy methods for splitting and compressing documents.

* Remove form submission, begin work on client side splitting.

* Add client side document splitting.

* Add client side archiving for the split documents.

* Fix a bug that adds an empty page to splitted documents due to a sorting error.

* Add a 'Split All' button and the relevant functionality.

---------

Co-authored-by: kazandaki <ahmetfiratusta@gmail.com>
Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>

src/main/resources/templates/multi-tool.html

@@ -42,6 +42,11 @@
                       rotate_right
                     </span>
                   </button>
+                  <button class="btn btn-secondary enable-on-file" onclick="splitAll()" disabled>
+                    <span class="material-symbols-rounded">
+                      cut
+                    </span>
+                  </button>
                   <button id="export-button" class="btn btn-primary enable-on-file" onclick="exportPdf()" disabled>
                     <span class="material-symbols-rounded">
                       download
@@ -105,4 +110,4 @@
   </script>
 </body>
 
-</html>
+</html>