(feat) O3-4215: Enable Environment Specification for Shell Builds

[jayasanka-sack]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. Ensure your PR title includes a conventional commit label (such as feat, fix, or chore, among others). See existing PR titles for inspiration.

For changes to apps

• My work conforms to the O3 Styleguide and design documentation.

If applicable

• My work includes tests or is validated by existing tests.
• I have updated the esm-framework mock to reflect any API changes I have made.

Summary

This PR introduces the ability to specify the build environment using the --env argument. By default, the environment is set to production if no argument is provided.

Motivation:
The esm-tutorials app requires tutorials to be enabled by default in the development environment while remaining disabled (or enabled by config) in production. This change makes it easier to handle such environment-specific configurations.

Related Issue

https://issues.openmrs.org/browse/O3-4215

[ibacher]

One small feature request here: could we also enable setting the environment via an env key in the build config JSON? This is more useful long-term, I think.

[jayasanka-sack]

@ibacher done! :)