cleanup and rename provider to plugin

cmdlet/_shared.py

@@ -276,7 +276,7 @@ class SharedArgs:
 
             # Plugin-based multi-instance backends (config["plugin"] / config["provider"] sections)
             try:
-                from ProviderCore.registry import REGISTRY
+                from PluginCore.registry import REGISTRY
                 plugin_instances = REGISTRY.list_storage_plugin_instances(config)
                 for _plugin_name, instance_names in plugin_instances.items():
                     names.update(instance_names)
@@ -1448,7 +1448,7 @@ def fetch_hydrus_metadata(
     client = hydrus_client
     hydrus_provider = None
     try:
-        from ProviderCore.registry import get_plugin
+        from PluginCore.registry import get_plugin
 
         hydrus_provider = get_plugin("hydrusnetwork", config)
     except Exception:
@@ -4177,7 +4177,7 @@ def check_url_exists_in_storage(
 
     hydrus_provider = None
     try:
-        from ProviderCore.registry import get_plugin
+        from PluginCore.registry import get_plugin
 
         hydrus_provider = get_plugin("hydrusnetwork", config)
     except Exception: