Add camera topic

[LeroyR]

Description

• Add a topic parameter to cameras to change topic prefixes

I am still looking at different REPs and package descriptions to find out if the image has to be published on base_topic/rgb/image instead of base_topic/rgb which could also require camera_info to be send twice.

Checklist

• Required by CI: Code is auto formatted using clang-format.
• Add a brief explanation of your changes to the changelog.