Add support for 3D/CAD file formats preview (#34794)

Fix #34775 

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/js/render/plugins/pdf-viewer.ts

@@ -0,0 +1,20 @@
+import type {FileRenderPlugin} from '../plugin.ts';
+
+export function newRenderPluginPdfViewer(): FileRenderPlugin {
+  return {
+    name: 'pdf-viewer',
+
+    canHandle(filename: string, _mimeType: string): boolean {
+      return filename.toLowerCase().endsWith('.pdf');
+    },
+
+    async render(container: HTMLElement, fileUrl: string): Promise<void> {
+      const PDFObject = await import(/* webpackChunkName: "pdfobject" */'pdfobject');
+      // TODO: the PDFObject library does not support dynamic height adjustment,
+      container.style.height = `${window.innerHeight - 100}px`;
+      if (!PDFObject.default.embed(fileUrl, container)) {
+        throw new Error('Unable to render the PDF file');
+      }
+    },
+  };
+}