Auth Web and other UIs: use common Business Search composable

[severinbeauvais]

In #16621, a business search component was written, based on a similar component in Create UI and Edit UI. In fact, a similar component also exists in MHR and in Business Search. Some are written in Class API and some are written in Composition API.

Ideally, there would be 1 common business search component, written as a composable, that all UIs could import once they are upgraded to Vue3.

• [ ] create reusable composable (from Business Search?)
  • needs to support various search parameters
  • needs to support various business search URLs
  • needs to support various business search API keys
  • needs to supoprt various account IDs
  • probably needs slot(s) to display results (list) in a flexible manner
  • may need props (or equivalent) to display messages in a flexible manner
  • see also extra functionality in Auth Web for disabling businesses that are already affiliated
  • what about the Business Search service (API code)?
  • add more here as needed...
• [ ] import and use it in Auth Web
• [ ] import and use it in Create UI
• [ ] import and use it in Edit UI
• [ ] import and use it in MHR?

Refs: https://github.com/bcgov/sbc-auth/pull/2365#discussion_r1235819821 https://github.com/bcgov/sbc-auth/pull/2365#discussion_r1235945743

[severinbeauvais]

I put an initial estimate on this ticket to show that it's a fair bit of work/refactoring (across multiple UIs). In fact, we may want to bring this down into sub-tickets when we get close to working on this.