Organize virtual hackathon

[JonasHelming]

To engage with the community of contributors and help people with contributing, we could conduct virtual hackathons.

There could be two types:

First Issue Hackathon
This guides mainly through the process of a contribution without too much technical difficulty. So the goal is to fix a very simple issue (good first issue) to get familiar with the process

Mentored Hackathon
Contributors are technically supported with fixing issues with medium complexity. The goal is to spread technical knowledge about the Theia code base and architecture.

[vince-fugnitto]

Along the same lines, I wonder if we should promote the project for the following hackatons in the future:

• Eclipse DemoCamp or Hackaton (which is probably the goal of the specific issue)
• Google Summer of Code
• Hacktoberfest
• Possibly others...