Base the implementation on the Analysis doc

CURRENT IMPLEMENTATION PROGRESS

REPO: https://github.com/gciavarrini/backstage-plugins/tree/add-openapi-router-v2

Implemented v2 endpoints:{}

•  /v2/workflows/overview
•  /v2/workflows/{workflowId}/overview
•  /v2/workflows
•  /v2/workflows/{workflowId}
•  /v2/workflows/instances

HOW TO WORK ON THIS ITEM

https://docs.google.com/document/d/1vvgOeOd8YVqqpPWUmI0twRTgkNx72Lu1Z1WEnyfRZvU/edit?usp=sharing

In the orchestrator plugin backend the endpoints are defined here https://github.com/caponetto/backstage-plugins/blob/cb4bc4f3f8ba0fff906ec0635f6441c99deb1f83/plugins/orchestrator-backend/src/service/router.ts#L129 and don't rely on openapi.

Add the openapi generator to programmatically create ts code from openapi.json file.