docs: add ngx-file-preview (#1031)

README.md

@@ -1182,6 +1182,7 @@ become an Angular expert.
 * [ngxf-uploader](https://github.com/ZouYouShun/ngxf-uploader) - File uploader for Angular 18+.
 * [ngx-dropzone-wrapper](https://github.com/zefoy/ngx-dropzone-wrapper) - Angular wrapper library for [Dropzone](https://www.dropzone.dev/).
 * [ngx-fileupload](https://github.com/r-hannuschka/ngx-fileupload) - [ngx-file-upload/core](https://github.com/r-hannuschka/ngx-fileupload/tree/master/src/projects/core) only contains services and classes to enable file upload with Angular. [ngx-file-upload/ui](https://github.com/r-hannuschka/ngx-fileupload/tree/master/src/projects/ui) contains components and pipes to provide a UI.
+* [ngx-file-preview](https://github.com/wh131462/ngx-file-preview) - A powerful preview tool for many file types.
 
 #### Forms