Add section about OSRD in annual report 2024

[cornelius]

One-page overview of the projects with brief summary and ideally some icon to visually represent each project.

For each project we will add the incubation stage as a small visiual indicator using the badge.

Each project should address the following topics:

• Which domain, which business requirement does it address
• Which functionality
• Technology
• Adoption, community
• Potential, future perspective
• Reached milestones

Content goes here: https://github.com/OpenRailAssociation/annual-report/blob/main/2024/0710-osrd.md

[cornelius]

I'm reopening the issue here, because we still have some work to do on the OSRD report. Main thing is to adapt the format and style to the one we use in the reports about the other project. This means more flowing text, less bullet point style. The information is there, but we need to put it in a form which is a bit easier to consume when reading the text.