Phase 3: core/shell/proxy

[teresa-ortega]

Proposed changes

A ShellProxy class under the shell/ subpackage as a first step towards a full shell abstraction layer. Commands like

ctx.shell.ros2.launch(...)
ctx.shell.evo_ape.bag2(...)
print [CMD]: <full command> 

to stdout instead of executing anything. The interface is fully generic, making it easily extensible and keeping benchmark code unchanged when swapping in a real shell implementation later.

Type of change

• 🐛 Bugfix (change which fixes an issue)
• 🚀 Feature (change which adds functionality)
• 📚 Documentation (change which fixes or extends documentation)

💥 No breaking changes.

Checklist

Put an x in the boxes that apply. This is simply a reminder of what we will require before merging your code.

• Lint and unit tests (if any) pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Additional comments

N/A

[xaru8145]

Almost there, final fix required.

[xaru8145]

LGTM.

Now that we have worked on the foundation of the SDK, it's a good idea to start creating tests that combine the different elements to assert hidden issues and verify integration.

We want to avoid having to manually test everything via the beluga benchmark example.