Renamed models to dto and create services folder

dto/errors.py

@@ -0,0 +1,15 @@
+from dataclasses import dataclass, field
+
+
+@dataclass
+class ValidationError:
+    """Model for validation errors."""
+    loc: list
+    msg: str
+    type: str
+
+
+@dataclass
+class HTTPValidationError:
+    """Model for HTTP validation errors."""
+    detail: list[ValidationError] = field(default_factory=list)