Improve license visibility in README

[sven1103-agent]

Summary

The project has two different licenses that are not currently visible in the README, making them hard to discover:

1. Source Code License (AGPL-3.0): The code is licensed under GNU Affero General Public License v3.0, but this is not mentioned in the README
2. Logo/Icon License: There is a separate restrictive license at assets/logo/LICENSE.md that prohibits modification, derivative works, and endorsement/affiliation implications

Suggested Changes

Please consider adding a "License" section to the README that:

• Clearly states the source code is under AGPL-3.0
• References the separate logo license at assets/logo/LICENSE.md
• Briefly explains why the logo has different terms (trademark/brand protection)

Why This Matters

• Users may not realize the logo cannot be used to imply endorsement
• Contributors may not know the code is AGPL-3.0 (affecting contribution decisions)
• Legal clarity reduces confusion for downstream users

References

• Logo license: https://github.com/qbicsoftware/compass/blob/main/assets/logo/LICENSE.md