[DOCS] where to add other package shout-outs?

pulled from docs:


In the future, Caesar will likely interact more closely with repos such as:
- [ ] [SensorFeatureTracking.jl](http://www.github.com/JuliaRobotics/SensorFeatureTracking.jl)
- [x] [AprilTags.jl](http://www.github.com/JuliaRobotics/AprilTags.jl)
- [ ] [RecursiveFiltering.jl](http://www.github.com/JuliaRobotics/RecursiveFiltering.jl)