Refactor password manager modules

src/seedpass/core/__init__.py

@@ -0,0 +1,19 @@
+# seedpass.core/__init__.py
+
+"""Expose password manager components with lazy imports."""
+
+from importlib import import_module
+
+__all__ = ["PasswordManager", "ConfigManager", "Vault", "EntryType"]
+
+
+def __getattr__(name: str):
+    if name == "PasswordManager":
+        return import_module(".manager", __name__).PasswordManager
+    if name == "ConfigManager":
+        return import_module(".config_manager", __name__).ConfigManager
+    if name == "Vault":
+        return import_module(".vault", __name__).Vault
+    if name == "EntryType":
+        return import_module(".entry_types", __name__).EntryType
+    raise AttributeError(f"module '{__name__}' has no attribute '{name}'")