feat: initialize aivideo project

backend/app/common/errors/app_error.py

@@ -0,0 +1,45 @@
+class AppError(Exception):
+    def __init__(
+        self,
+        message: str,
+        *,
+        code: int,
+        status_code: int,
+        errors: list[dict] | None = None,
+    ) -> None:
+        super().__init__(message)
+        self.message = message
+        self.code = code
+        self.status_code = status_code
+        self.errors = errors or []
+
+
+class AuthenticationError(AppError):
+    def __init__(self, message: str = "unauthorized") -> None:
+        super().__init__(message, code=10001, status_code=401)
+
+
+class AuthorizationError(AppError):
+    def __init__(self, message: str = "forbidden") -> None:
+        super().__init__(message, code=10002, status_code=403)
+
+
+class ValidationAppError(AppError):
+    def __init__(self, message: str, errors: list[dict] | None = None) -> None:
+        super().__init__(message, code=10003, status_code=422, errors=errors)
+
+
+class NotFoundAppError(AppError):
+    def __init__(self, message: str, *, code: int = 40400) -> None:
+        super().__init__(message, code=code, status_code=404)
+
+
+class ConflictAppError(AppError):
+    def __init__(self, message: str, *, code: int = 40900) -> None:
+        super().__init__(message, code=code, status_code=409)
+
+
+class BusinessAppError(AppError):
+    def __init__(self, message: str, *, code: int, status_code: int = 400) -> None:
+        super().__init__(message, code=code, status_code=status_code)
+