Prototype new generation of kyma CLI

[kwiatekus]

Description
Design and implement a prototype version of new kyma CLI that helps developers who use managed kyma runtimes within BTP ecosystem with development of their CAP applications

The prototype should include:

• automated lifecycle management of kyma runtime lifecycle (provisioning, deprovisioning)
• getting access to freshly created cluster
• attaching BTP service instances to kyma runtimes via service manager

The prototype should be implemented with devops purpose in mind (enable automation).
It should also provide a concept how to reuse the logic in the UI.

The prototype is successful if satisfies the following MVP criteria:

• allows provisioning kyma runtime from CI/CD workflow (using configured SAP BTP CIS credentials)
• allows OIDC based access to freshly created kyma runtime from the CI/CD workflow
• allows attaching (already existing) Hana DB service instance into kyma runtime
• (helps deploying CAP application that uses hanaDB, i.e bookstore into kyma runtime) - this is just kubernetes resources deployment (but referencing known secret )
• allows deprovisioning kyma runtime w/o decomisioning hana db instance

Reason
The goal behind the prototype is to drive initial design around common development journeys simplify them.
Our ultimate goal is to revamp the kyma CLI to simplify development journeys around kyma runtime within SAP BTP ecosystem (kyma-project/kyma#18198).

Links
POC for getting access using additional OIDC
nodejs based prototype by @pbochynski
Related Killercoda tutorials:
https://killercoda.com/interactive-kyma/scenario/oss-modules
https://killercoda.com/kyma-project/scenario/btp-services

[kwiatekus]

AS of today, the new prototype commands allow to

• provision managed kyma runtime within SAP BTP subaccount
• create hana db instance in an automated way (incl. binding and mapping to kyma).
• create references to shared instances

Getting access to new kyma runtime vi kyma CLI (in 100% automated scenario) will be possible after implementig A) or B)
A) kyma-project/kyma#18305
B) kyma-project/kyma-environment-broker#284

Next steps

• Deprecate selected commands in kyma CLI #2051
• Organize new kyma CLI commands around provisioning domain #2029

[kwiatekus]

Closing as duplicate in favor of kyma-project/kyma#18198