bb-common needs a script that automatically updates the schema for consuming packages

Motivation

Currently integrating with bb-common is a very manual process that involves updating the consuming chart's values schema manually. Ideally, bb-common would have a script that's consumable straight from repo1 that handles this for you.

Acceptance Criteria

• A script must exist in bb-common that:
  • Automatically fetches the schema from bb-common based on the version in the consuming chart's Chart.yaml
  • Integrates this bb-common schema into the consuming chart's schema; make sure definitions are also integrated
• The bb-common migration docs fully document the usage patterns for this script