fix(cmd): Pre-Compile Demo Config

[jshlbrd]

Description

• Fixes an issue where the CLI tool substation demo cannot be run from any location

Motivation and Context

The existing substation demo command relies on the substation.libsonnet file in the project's root, and this causes an issue if the demo is not run from a path relative to that file. This pre-compiles the config so that the demo can be run from anywhere.

How Has This Been Tested?

Reinstall the CLI tool and run substation demo from any directory.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.