Add TypeFox as adopters of Theia, Sprotty, and Open VSX

Created by: brianking

Project Name = "Eclipse Theia, Eclipse Sprotty, Eclipse Open VSX"

Information about your Organization

• Name: TypeFox
• Website: https://www.typefox.io/

Logos

Important: Please attach your logos in svg or png format, zipped if svg. Please note that we require both color options for logos for distribution purposes.

• We need color logo with transparent background.
• We also need white logo with a transparent background.