Provide а How-to guide for utilizing the local communication via a containerized application

[konstantina-gramatova]

Based on a key Kanto use case provided in eclipse-kanto/container-management#72, it's important to enable the usage of the described specifics via an appropriate guide.

• The How-to guide should provide an example of a containerized application deployed at the edge that uses the local Kanto communication to update the digital twin it is based on - e.g. the application can create a new demo Ditto feature and adjust a property in its definition
• The example in the How-to guide should be executed via Eclipse Hono Sandbox
• The How-to guide must be included in Eclipse Kanto Documentation
• If required, the Getting started Python scripts can be updated