refactor: imports and reorganize domain structure

- Updated import statements across multiple modules to use relative imports for better encapsulation.
- Consolidated and organized the `__init__.py` files in various domain packages to expose necessary classes and functions.
- Improved code readability and maintainability by grouping related imports and removing unused ones.
- Ensured consistent import patterns across the domain, enhancing the overall structure of the codebase.

domain/auth/__init__.py

@@ -0,0 +1,49 @@
+from .service import (
+    ALGORITHM,
+    AuthService,
+    authenticate_user_db,
+    create_access_token,
+    get_current_active_user,
+    get_current_user,
+    get_password_hash,
+    has_users,
+    register_user,
+    request_password_reset,
+    reset_password_with_token,
+    verify_password,
+    verify_password_reset_token,
+)
+from .types import (
+    PasswordResetConfirm,
+    PasswordResetRequest,
+    RegisterRequest,
+    Token,
+    TokenData,
+    UpdateMeRequest,
+    User,
+    UserInDB,
+)
+
+__all__ = [
+    "ALGORITHM",
+    "AuthService",
+    "authenticate_user_db",
+    "create_access_token",
+    "get_current_active_user",
+    "get_current_user",
+    "get_password_hash",
+    "has_users",
+    "register_user",
+    "request_password_reset",
+    "reset_password_with_token",
+    "verify_password",
+    "verify_password_reset_token",
+    "PasswordResetConfirm",
+    "PasswordResetRequest",
+    "RegisterRequest",
+    "Token",
+    "TokenData",
+    "UpdateMeRequest",
+    "User",
+    "UserInDB",
+]