file_icons: Add license file (#10128)

This PR adds a missing license file to the `file_icons` crate.

Release Notes:

- N/A

Marshall Bowers committed 2y ago

469be39a32133c4a5a68780f7dcc45ac62656061

Parent: db5d53d

Committed by GitHub <noreply@github.com> on 4/3/2024, 4:07:53 PM