fix: logic in path_utilities.py that doesn't treat Path objects correctly

Author: moe-ad

examples/08-python-operators/02-python_operators_with_dependencies.py

@@ -188,7 +188,7 @@
 )
 
 dpf.load_library(
-    dpf.path_utilities.join(tmp, "plugins", "gltf_plugin"),
+    dpf.path_utilities.join(str(tmp), "plugins", "gltf_plugin"),
     "py_dpf_gltf",
     "load_operators",
 )

src/ansys/dpf/core/path_utilities.py

@@ -61,7 +61,7 @@ def join(*args, **kwargs):
     server = None
     parts = []
     for a in args:
-        if isinstance(a, (str, Path)) and len(a) > 0:
+        if isinstance(a, (str, Path)) and len(str(a)) > 0:
             parts.append(str(a))
         elif isinstance(a, ansys.dpf.core.server_types.LegacyGrpcServer):
             server = a