Issue #678 hfb varying top bot

[JoerivanEngelen]

Fixes #678

Description

Support horizontal flow barriers with varying ztop and zbottom. Data is set up as vertical polygons, which is also what imod.formats.gen.read_gen() returns. The implementation is based on imod.formats.prj.disv_converter. When we fix the wells, we are feature complete and the disv_converter can be removed.

The use of the vertical dimension means a change in the public API: No longer are the "ztop" and "zbottom" variables in the geodataframe used. Setting up these vertical polygons from scratch is a bit of a hassle, so we could add some utility functions to help setting these up, in a later PR.

Checklist

• [x] Links to correct issue
• [x] Update changelog, if changes affect users
• [x] PR title starts with Issue #nr, e.g. Issue #737
• [x] Unit tests were added
• [x] If feature added: Added/extended example

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud