Create CI/CD overview diagram

[devlace]

DoD:

• Document the entire CI/CD process in a diagram similar to Parking Sensor.
• CI/CD process diagram is added to README.
• Drawio format included.

[devlace]

Current strawman is for Option 3, however everyone is expected to familiarize themselves with the https://learn.microsoft.com/en-us/fabric/cicd/manage-deployment article and we'll discuss in the PR of this issue.