E2E Testing - Create a testing interface to pass the results of tests between the view and controller

Currently results are processed in the backend TestRemote implementation.
That means that there is only one data representation that is generated.

We would like to have a data structure to abstract test results.
This data structure that the TestRemote will return could then be processed by any valid template to generate multiple outputs (JSON, ASCII table, Junit XML)

Plan out and implement the data structure.
Keep in mind that this data structure is a `shore-core` feature, which means it may be a new package entirely!

Start by reading the backend TestRemote implementation and tracing how test results are currently processed. The work is complete when shore-core exposes an abstract test-result data structure that templates can use to generate JSON, ASCII-table, and JUnit XML outputs.

Written by the indexing model from the issue text.