Feature: Undo Redo options multi tool #2297 (#2348)

* Implement Command class for Command Pattern

Created a base `Command` class to implement the **Command Pattern**. This class provides a skeletal implementation for `execute`, `undo`, and `redo` methods.

**Note:** This class is intended to be subclassed and not instantiated directly.

* Add undo/redo stacks and operations

* Use rotate element command to perform execute/undo/redo operations

* Handle commands executed through events
- Add "command-execution" event listener to execute commands that are not invoked from the same class while adding the command to the undo stack and clearing the redo stack.

* Add and use rotate all command to rotate/redo/undo all elements

* Use command pattern to delete pages

* Use command pattern for page selection

* Use command pattern to move pages up and down

* Use command pattern to remove selected pages

* Use command pattern to perform the splitting operation

* Add undo/redo functionality with filename input exclusion

- Implement undo (Ctrl+Z) and redo (Ctrl+Y) functionality.
- Prevent undo/redo actions when the filename input field is focused.
- Ensures proper handling of undo/redo actions without interfering with text editing.

* Introduce UndoManager for managing undo/redo operations

 - Encapsulate undo/redo stacks and operations within UndoManager.
- Simplify handling of undo/redo functionality through a dedicated manager.

* Call execute on splitAllCommand

- Fix a bug that caused split all functionality to not work as execute() wasn't called on splitAllCommand

* Add undo/redo buttons to multi tool

- Add undo/redo buttons to multi tool
- Dispatch an event upon state change (such as changes in the undo/redo stacks) to update the UI accordingly.

* Add undo/redo to translations

* Replace hard-coded "Undo"/"Redo" with translation keys in multi tool

---------

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

src/main/resources/static/js/multitool/commands/delete-page.js

@@ -0,0 +1,74 @@
+import { Command } from "./command.js";
+
+export class DeletePageCommand extends Command {
+  constructor(element, pagesContainer) {
+    super();
+
+    this.element = element;
+    this.pagesContainer = pagesContainer;
+
+    this.filenameInputValue = document.getElementById("filename-input").value;
+
+    const filenameParagraph = document.getElementById("filename");
+    this.filenameParagraphText = filenameParagraph ? filenameParagraph.innerText : "";
+  }
+
+  execute() {
+    this.nextSibling = this.element.nextSibling;
+
+    this.pagesContainer.removeChild(this.element);
+    if (this.pagesContainer.childElementCount === 0) {
+      const filenameInput = document.getElementById("filename-input");
+      const filenameParagraph = document.getElementById("filename");
+      const downloadBtn = document.getElementById("export-button");
+
+      filenameInput.disabled = true;
+      filenameInput.value = "";
+      filenameParagraph.innerText = "";
+
+      downloadBtn.disabled = true;
+    }
+  }
+
+  undo() {
+    let node = this.nextSibling;
+    if (node) this.pagesContainer.insertBefore(this.element, node);
+    else this.pagesContainer.appendChild(this.element);
+
+    const pageNumberElement = this.element.querySelector(".page-number");
+    if (pageNumberElement) {
+      this.element.removeChild(pageNumberElement);
+    }
+
+    const filenameInput = document.getElementById("filename-input");
+    const filenameParagraph = document.getElementById("filename");
+    const downloadBtn = document.getElementById("export-button");
+
+    filenameInput.disabled = false;
+    filenameInput.value = this.filenameInputValue;
+    if (this.filenameParagraph)
+      filenameParagraph.innerText = this.filenameParagraphText;
+
+    downloadBtn.disabled = false;
+  }
+
+  redo() {
+    const pageNumberElement = this.element.querySelector(".page-number");
+    if (pageNumberElement) {
+      this.element.removeChild(pageNumberElement);
+    }
+
+    this.pagesContainer.removeChild(this.element);
+    if (this.pagesContainer.childElementCount === 0) {
+      const filenameInput = document.getElementById("filename-input");
+      const filenameParagraph = document.getElementById("filename");
+      const downloadBtn = document.getElementById("export-button");
+
+      filenameInput.disabled = true;
+      filenameInput.value = "";
+      filenameParagraph.innerText = "";
+
+      downloadBtn.disabled = true;
+    }
+  }
+}