remove PYTHONPATH stuff, add sys.path.append to create_runner_dict instead

pytest_abra/coordinator.py

@@ -1,5 +1,6 @@
 import importlib
 import re
+import sys
 from pathlib import Path
 
 from loguru import logger
@@ -90,11 +91,17 @@ class Coordinator:
             "wordpress": RunnerWordpress,
             "nextcloud": RunnerNextcloud,
         }
+
+        The Runner classes are automatically imported with importlib. The imports are successful
+        because recipes_dir is added to sys.path.
         """
 
         RUNNER_DICT: dict[str, type["Runner"]] = dict()
         runner_discovery_pattern = re.compile("Runner.+")
 
+        # make it possible to import modules from recipes_dir
+        sys.path.append(recipes_dir.as_posix())
+
         for module_path in recipes_dir.rglob("*/runner*.py"):
             rel_path = module_path.relative_to(recipes_dir).as_posix().replace("/", ".").replace(".py", "")
             module = importlib.import_module(rel_path)