Finished API implementation and Base for CLI-Tool

[Mopsgeschwindigkeit]

Summary

This PR should be seen as a good base for further development. All Implemented features a working and are fully test (89% test coverage).

This PR introduces a complete redesign of the CLI and a complete implementation of the public API's. (more information below).

For the foreseeable future I will stop working on this project, because of:

• Future of the public API not sure
• Company support is very little (which is completely understandable!)
• Currently I do not see someone using it.

API

This PR contains the complete implementation of every public API Endpoint provided via PublicAPIv2 and IntegrationAPIV2. Located in sxapi/src/<publicV2|integrationV2>

CLI

It also contains a basis for further CLI Tool implementations. Can be found under sxapi/src/cli.
There already some example Implementations for the CLI -> the animals, abort and token parser.

I did did full rebuild of the CLI design, thats why the approach is completely different from previous one.
The CLI now follows a kubectl style design, like

• sxapi animals get --ids <id1> <id2>
• sxapi aborts delete <animal_id> <abort_id>
• ...