Refactor page number input handling in PdfViewer (#63)

Updated the input field in `PdfViewer.razor` to use explicit binding with `@bind:event`, `@bind:get`, and `@bind:set`. Introduced the `OnPageNumberInput` method to enqueue tasks for processing page number changes asynchronously. This improves control over input events and enhances the overall user experience.

NOTE: This commit message is auto-generated using GitHub Copilot.

Author: gvreddy04

BlazorExpress.Bulma/Components/PdfViewer/PdfViewer.razor

@@ -10,7 +10,13 @@
                 <BootstrapIcon Class="@BulmaExpressCssClass.CursorPointer" Name="BootstrapIconName.ChevronDown" Size="BootstrapIconSize.Medium" @onclick="NextPageAsync" title="Next Page" />
             </div>
             <div class="level-item">
-                <input class="input is-small" style="width:60px;" type="number" @bind-value="pageNumber" placeholder="Enter page number" />
+                <input class="input is-small"
+                       style="width:60px;"
+                       type="number"
+                       @bind:event="oninput"
+                       @bind:get="pageNumber" 
+                       @bind:set="OnPageNumberInput"                       
+                       placeholder="Enter page number" />
                 <div class="pl-2">of @pagesCount</div>
             </div>
         </div>

BlazorExpress.Bulma/Components/PdfViewer/PdfViewer.razor.cs

@@ -114,6 +114,11 @@ private int GetZoomPercentage(int zoomLevel) =>
 
     private async Task NextPageAsync() => await PdfViewerJsInterop.NextPageAsync(objRef!, Id!);
 
+    private void OnPageNumberInput(int value)
+    {
+        queuedTasks.Enqueue(async () => await PageNumberChangedAsync(value));
+    }
+
     private async Task PageNumberChangedAsync(int value)
     {
         if (value < 1 || value > pagesCount)