Framework used for AI tooling and UI unit tests

[magnesj]

1. ResInsight does not have a test framework to test UI operations. Examples workflow:

• create a range filter, and verify that the filter is created
• manipulate the filter, and verify that the visible cells are updated
• delete the filter, verify that the filter is deleted from UI and view is updated accordingly

2. The second use case is to allow AI tooling to simulate UI events similar to the description above.

I have prototyped use of httpserver in #992

Investigate alternatives for these use cases. If possible, suggest one solution covering both requirements.