Add "Back In Time"

[buhtz]

Hello,

adding Back In Time project. The Issue section is at: https://github.com/bit-team/backintime/issues

Not sure how to answer the second bullet point. What time frame do we talk about? What is a "contributor"? Over the 15 years that project exists of course there are more then 10 of them. But currently the maintenance team consist of 3 members plus the formal maintainer in the back.

ℹ️ Repository information

The repository has:

• [X] At least three issues with the good first issue label.
• [ ] At least 10 contributors.
• [X] Detailed setup instructions for the project.
• [X] CONTRIBUTING.md
• [X] Actively maintained.

[vercel[bot]]

@buhtz is attempting to deploy a commit to the DeepSource Team on Vercel.

A member of the Team first needs to authorize it.