Issue1632 remove images (#1645)

* Implemented PdfImageRemovalService.java and PdfImageRemovalController.java. Image can be removed testing using Postman, but the file size doesn't change.

* Fix removal logic in service file to decrease file size.

* Implement "Remove Image" feature on the website

Updated the front-end code to integrate the "Remove Image" feature. The new functionality is now fully operational on the website, allowing users to remove images as expected.

* Add comments to PdfImageRemovalController and PdfImageRemovalService.

* Change the google material icon in navbar, homepage and remove-image-pdf.html.

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

@@ -195,6 +195,9 @@
                         <div
                           th:replace="~{fragments/navbarEntry :: navbarEntry ('get-info-on-pdf', 'info', 'home.getPdfInfo.title', 'home.getPdfInfo.desc', 'getPdfInfo.tags', 'other')}">
                         </div>
+                        <div
+                                th:replace="~{fragments/navbarEntry :: navbarEntry ('remove-image-pdf','remove_selection', 'home.removeImagePdf.title', 'home.removeImagePdf.desc', 'removeImagePdf.tags', 'other')}">
+                        </div>
                       </div>
                       <!-- Advance menu items -->
                       <div class="col-lg-2 col-sm-6 py px-xl-1 px-2">