Feature editing - Tracking issue

[ThomasEverding]

The feature editing consists of the following aspects:

• [x] #41
• [x] #42
• [ ] #43

out of scope:

• Other service types than OGC API Feature Services
• Other geometry types than polygons
• User interface for attribute editing

[dpayk]

Maybe this can be helpful, a sample implementation for the OGC API Features Editing https://github.com/interactive-instruments/ol-ogc-api-crud