docs: update document

Signed-off-by: ktro2828 <[email protected]>

docs/tutorials/customize.md

@@ -1,3 +1,27 @@
+## Generate Schema with a new token
+
+---
+
+You can crate a schema containing the specified table data with a new token using `new(...)` methods.
+
+```python title="generate_attribute.py"
+from t4_devkit.schema import Attribute, serialize_schema
+
+# table data without the token field
+data = {
+    "name": "foo",
+    "description": "this is re-generated attribute."
+}
+
+attr1 = Attribute.new(data)
+
+# Also, it allows us to create a copy of the existing table data with a new token
+serialized = serialize_schema(attr1)
+attr2 = Attribute.new(serialized)
+
+assert attr1.token != attr2.token
+```
+
 ## Customize Schema
 
 ---