igHTMLEditor: Copy pasting from Excel

[PatelShruti411]

Description

Copy pasting from excel doesn't copy all styles

• ignite-ui version: 21.2.9
• browser: any

Steps to reproduce

1. Open the sample for igHTMLEditor
   https://www.igniteui.com/html-editor/overview
2. Copy paste any table from excel file

Result

Only the data is getting copied

Expected result

the styles, ex. borders, colors, font styles, etc. should also get copied

Attachments

Attach a sample if available, and screenshots, if applicable.