cleanup and rename provider to plugin

CLI.py

@@ -98,7 +98,7 @@ from SYS.result_table import Table
 
 from SYS.worker import WorkerManagerRegistry, WorkerStages, WorkerOutputMirror, WorkerStageSession
 from SYS.pipeline import PipelineExecutor
-from ProviderCore.registry import plugin_inline_query_choices
+from PluginCore.registry import plugin_inline_query_choices
 
 
 
@@ -505,7 +505,7 @@ class CmdletIntrospection:
             if normalized_arg == "plugin":
                 canonical_cmd = (cmd_name or "").replace("_", "-").lower()
                 try:
-                    from ProviderCore.registry import (
+                    from PluginCore.registry import (
                         list_configured_plugin_names_with_capability,
                         list_plugin_names_for_cmdlet,
                     )
@@ -546,7 +546,7 @@ class CmdletIntrospection:
 
             if normalized_arg == "scrape":
                 try:
-                    from plugins.metadata_provider import list_metadata_plugins
+                    from plugins.metadata_plugin import list_metadata_plugins
 
                     metadata_plugins = list_metadata_plugins(config) or {}
                     if metadata_plugins:
@@ -765,7 +765,7 @@ class CmdletCompleter(Completer):
             return []
 
         try:
-            from ProviderCore.registry import get_plugin_class
+            from PluginCore.registry import get_plugin_class
         except Exception:
             return []