updated plugin refactor and added FTP and SCP plugins , also hydrusnetwork plugin migration

ProviderCore/registry.py

@@ -136,7 +136,28 @@ class ProviderRegistry:
         self._discovered = False
         self._external_dirs_scanned = False
 
+    def _ensure_builtin_package_dirs(self) -> None:
+        if self._builtin_package_dirs or not self.package_name:
+            return
+        try:
+            package = importlib.import_module(self.package_name)
+        except Exception:
+            return
+
+        package_path = getattr(package, "__path__", None)
+        if not package_path:
+            return
+
+        builtin_dirs: List[Path] = []
+        for entry in package_path:
+            try:
+                builtin_dirs.append(Path(str(entry)).resolve())
+            except Exception:
+                builtin_dirs.append(Path(str(entry)))
+        self._builtin_package_dirs = tuple(builtin_dirs)
+
     def _is_builtin_package_dir(self, candidate: Path) -> bool:
+        self._ensure_builtin_package_dirs()
         try:
             resolved = candidate.resolve()
         except Exception:
@@ -253,6 +274,7 @@ class ProviderRegistry:
         if self._external_dirs_scanned:
             return
         self._external_dirs_scanned = True
+        self._ensure_builtin_package_dirs()
 
         for plugin_dir in _iter_external_plugin_dirs():
             if self._is_builtin_package_dir(plugin_dir):
@@ -302,15 +324,8 @@ class ProviderRegistry:
             return
 
         self._register_module(package)
+        self._ensure_builtin_package_dirs()
         package_path = getattr(package, "__path__", None)
-        if package_path:
-            builtin_dirs: List[Path] = []
-            for entry in package_path:
-                try:
-                    builtin_dirs.append(Path(str(entry)).resolve())
-                except Exception:
-                    builtin_dirs.append(Path(str(entry)))
-            self._builtin_package_dirs = tuple(builtin_dirs)
         if not package_path:
             self._discover_external_plugins()
             return