fix(IGNGPF-2221): fix encoding problem

Closes IGNGPF-2221

gpf_agent_geoserver/core_function.py

@@ -332,11 +332,12 @@ def add_style(
     """
     try:
         with open(style_path) as f:
-            geoserver.create_style(
-                name=style_name, data=f.read(), workspace=workspace_name
-            )
+            data = f.read().encode("utf-8")
+            geoserver.create_style(name=style_name, data=data, workspace=workspace_name)
         return Status.OK
-
+    except UnicodeEncodeError as e:
+        logger.error(f"add_style - Failed to encode with utf-8 encoding | {e}")
+        return Status.ERROR
     except Exception as e:
         logger.error(f"add_style - {e}")
         return Status.ERROR