feat: create favourite openings api

[RMCampos]

Description

Create APIs to handle User Favourite Openings.

Fixes Jira task SILVA-358

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Tested locally on Swagger-UI and with unit tests.

Checklist

• I have read the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have already been accepted and merged

Further comments

---

Thanks for the PR!

Any successful deployments (not always required) will be available below.

Backend: https://nr-silva-266-backend.apps.silver.devops.gov.bc.ca/actuator/health
Frontend: https://nr-silva-16-frontend.apps.silver.devops.gov.bc.ca

Once merged, code will be promoted and handed off to following workflow run.
Main Merge Workflow

[RMCampos]

@DerekRoberts code coverage on the way. I'll be pushing more unit tests tomorrow 🚀

[RMCampos]

@DerekRoberts much better now 😄

[DerekRoberts]

Very nice. Go @RMCampos! :D