circle-based boundaries not currently supported with pywake

[bjarketol]

See title.

One benefit of supporting circles would be that the (optional) CRS objects can be added. Circles are the only place you can add a crs in windIO (afaik).

traceback:

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
Cell In[55], [line 4]
       2 with fmc.working_directory(paths.run / "exp1"):  # temporary fix for relative paths
       3     shutil.rmtree("output", ignore_errors=True)
---->  4    wifa.run_api(yaml_file.resolve())

File ~/projects/wifa/wifa/main_api.py:26, in run_api(yaml_input)
      23 model_name = yaml_dat["attributes"]["flow_model"]["name"]
      25 if model_name.lower() == "pywake":
--->  26   pywake_aep = run_pywake(yaml_input)
      28 elif model_name.lower() == "foxes":
      29    foxes_aep = run_foxes(yaml_input)

File ~/projects/wifa/wifa/pywake_api.py:253, in run_pywake(yamlFile, output_dir)
     239 # farm = 'examples/plant/plant_wind_farm/IEA37_case_study_3_wind_farm.yaml'
     240 # with open(farm, "r") as stream:
     241 #    try:
    (...)    250 #    except yaml.YAMLError as exc:
     251 #        print(exc)
     252 resource_dat = system_dat["site"]["energy_resource"]
-->  253 WFXLB = np.min(system_dat["site"]["boundaries"]["polygons"][0]["x"])
     254 WFXUB = np.max(system_dat["site"]["boundaries"]["polygons"][0]["x"])
     255 WFYLB = np.min(system_dat["site"]["boundaries"]["polygons"][0]["y"])

KeyError: 'polygons'