Vincent Fugnitto authored Jan 11, 2021 and Martin Lowe committed Jan 11, 2021

The following commit updates the `projects` which Ericsson is an
adopter. The update includes:
- adding `Eclipse Theia`
- adding `Eclipse Sprotty`
- adding `Eclipse Open-VSX`

Signed-off-by: vince-fugnitto <vincent.fugnitto@ericsson.com>