Move Cosmos Emulator setup to onCreate for Prebuild

[joaquinrz]

Type of PR

• Documentation changes
• Code changes
• Test changes
• CI-CD changes
• GitHub Template changes

PR Checklist

• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code follows the code style of this project.
• I ran lint checks locally prior to submission.
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Purpose of PR

To move the cosmos emulator create script to onCreate to enable Codespaces prebuild

Does this introduce a breaking change

• YES
• NO

Validation

• Unit tests updated and ran successfully
• Update documentation or issue referenced above

Issues Closed or Referenced

• Closes https://github.com/retaildevcrews/wcnp/issues/855

[kforeverisback]

Tested.
Works when first created and works after resuming.
Cosmos emulator working as expected.