gs-frontend-lib: Create a utilities lib around gs-python

[soad003]

The gs-python repository is a simple wrapper around the gs-rest interface. This is often not very convenient to use and results in a lot of boilerplate code in notebooks etc.

Shipping certain utility functions with a well defined interface with gs-python could vastly improve the workflow for notebook users or other people that want to integrate gs in their tools.

It is also a great way to ship cool new features to users.

[soad003]

We have created two examples how the new api simplified api could look like. Decision is outstanding. We feel that this is going to be a bigger issue.

Examples can be found these two branches

• https://github.com/graphsense/graphsense-python/tree/feature/simple_api
• https://github.com/graphsense/graphsense-python/tree/gen_flat_api