Add JAIS MaaS Sample

[hazemelh]

Description

Adding a JAIS Sample for Model-as-a-service

Checklist

• [X ] I have read the contribution guidelines.
  • General
  • SDK
  • CLI
• [X ] I have coordinated with the docs team ([email protected]) if this PR deletes files or changes any file names or file extensions.
• [ X] Pull request includes test coverage for the included changes.
• [X] This notebook or file is added to the CODEOWNERS file, pointing to the author or the author's team.