Fix synchros2 aliasing as bdai_ros2_wrappers

[mhidalgo-bdai]

Proposed changes

Follow-up to #133. This one caught me off guard. It turns out it's not enough to alias the top-level package, otherwise CPython will liberally duplicate subpackages and modules, wreaking havoc in any code that relies on globals (like synchros2.scope and synchros2.process).

Thus, this patch eagerly and recursively imports and aliases synchros2 and all its subpackages and modules. This effectively makes import bdai_ros2_wrappers a slower operation, but the penalty is not significant and we will eventually deprecate and remove this alias.

Checklist

• Lint and unit tests pass locally
• I have added tests that prove my changes are effective
• I have added necessary documentation to communicate the changes