feat: Automatically put dataclass decorator

if @DataClass decorator not found, put it automatically

serde/de.py

@@ -146,6 +146,10 @@ def deserialize(
     """
 
     def wrap(cls: Type):
+        # If no `dataclass` found in the class, put it automatically.
+        if not is_dataclass(cls):
+            cls = dataclass(cls)
+
         g: Dict[str, Any] = {}
 
         # Create a scope storage used by serde.

serde/se.py

@@ -153,6 +153,10 @@ def serialize(
     """
 
     def wrap(cls: Type):
+        # If no `dataclass` found in the class, put it automatically.
+        if not is_dataclass(cls):
+            cls = dataclass(cls)
+
         g: Dict[str, Any] = {}
 
         # Create a scope storage used by serde.

tests/test_basics.py

@@ -98,12 +98,10 @@ class C:
 
 
 def test_non_dataclass():
-    with pytest.raises(TypeError):
-
-        @deserialize
-        @serialize
-        class Foo:
-            i: int
+    @deserialize
+    @serialize
+    class Foo:
+        i: int
 
 
 # test_string_forward_reference_works currently only works with global visible classes