Add Shell (.sh) support to the CONTROL-CORE CLI

[luqq-md]

Hey everyone,

While exploring the CONTROL-CORE CLI, I noticed that shell script nodes aren't recognised consistently.

The existing study generation logic already has handling for .sh files, but the CLI doesn't seem to recognise them properly.

I tried creating a simple workflow with a node pointing to controller.sh and ran the validate and inspect commands.

Here's what I noticed:

1. Validation

Running concore validate produces this warning:

Node 'N1:controller.sh' has unusual file extension

The workflow still passes validation, but the warning is misleading when the source file exists.

2. Inspection

Running concore inspect classifies the same node as:

Language: Other

I think it would be useful to have proper Shell (.sh) recognition in the CLI.

Possible improvements:

• Recognise .sh as a supported extension in validation, where applicable.
• Display Shell instead of Other in inspection.
• Keep language classification consistent in regular and JSON output.
• Consider how shell nodes should be handled by the CLI build workflow.

I reproduced this locally on Windows using the current dev branch.
Would adding Shell support to the CLI be something worth considering?

Thanks!