Feature Request: Consume colcon packages from Bazel?

[EricCousineau-TRI]

(Sorry if this isn't the right place to post; lemme know if I should move this!)

Can I ask if there are any recipes to consume colcon artifacts / packages from Bazel?

e.g. wanting to consume the C++ or Python version of rcl

I've started drafting out stuff here, and wrote my current understanding of this project; open to changing it if I'm wrong!
ros2_bazel_protoype (commit)

UPDATE: As of ros2_bazel_prototype@e664a5b, got a generic-ish CMake C++ interface (well, target) consumer, with a template for ament, that handles direct linking. However, that does not play well with the rmw implementation discovery (which may rely heavily on only dlopen behavior...). Added in overlay handling to see if there's a way to "work around" it.