[feat]: new XLS, ZIP and CSV icons

[lucasboilly]

A clear and concise description of what the feature is

3 new icons for "xls", "zip" and "csv" taken from Phosphor, our new icon library.

Please find the link and naming for each icon:

• xls, to rename to FileXls
• zip, to rename to FileZip
• csv, to rename to FileCsv

Why should this feature be included?

We'll need it for upcoming improvements in the Media Library.

Please provide an example for how this would work

We need to add 3 new .svg files in our icons folder in order to be able to use it in our products.