push command to deploy an image by name

[kwiatekus]

Description

Implement a new alpha command in kyma cli v3 allowing users to create deployment in kyma runtime when given

• app name
• image name
• containerPort (is it needed? check how kyma dashboard does it w/o this input)

For example:

kyma alpha app push --name mynginx --image nginx:latest --containerPort xx

Reasons

Enable easy way to deploy single workloads w/o having to create manifests for kubernetes basic objects.
Improve learning experience for users who are more familiar with cf api than k8s api.