Delete docker_module — re-add as NativeModule subclass if/when needed

[leshy]

dimos/core/docker_module.py (693 LOC) is a parallel ModuleProxyProtocol impl — DockerModuleProxy, DockerModuleConfig, DockerModuleInner — none of it extends NativeModule. Same in coordination: worker_manager_docker.py sits next to worker_manager_python.py doing largely the same thing, both wired up in module_coordinator.py:56.

bad arch to keep around. just delete it.

if/when we want docker support back, it goes in as a thin subclass of NativeModule that only overrides how the child process is launched (docker run instead of plain exec). image build / cache logic moves to a separate helper that NativeModule doesn't need to know about.

scope:

• delete dimos/core/docker_module.py
• delete dimos/core/coordination/worker_manager_docker.py
• drop WorkerManagerDocker from module_coordinator.py:56
• delete examples/docker_hello_world/
• two real consumers to migrate or hold: dimos/manipulation/grasping/graspgen_module.py (GraspGenConfig(DockerModuleConfig)) and dimos/manipulation/pick_and_place_module.py (uses DockerModuleProxy)

related: #1266 — we still want unification; but delete this first to make sure we don't build upon it. (re-add as a NativeModule subclass instead of refactoring the parallel hierarchy in place). also #1082 (config system).