feat: add list.sort

Author: raisadz

narwhals_daft/expr_list.py

@@ -41,6 +41,11 @@ def func(expr: Expression) -> Expression:
 
         return self.compliant._with_elementwise(func)
 
+    def sort(self, *, descending: bool, nulls_last: bool) -> DaftExpr:
+        return self.compliant._with_elementwise(
+            lambda expr: F.list_sort(expr, desc=descending, nulls_first=not nulls_last)
+        )
+
     unique = not_implemented()
     contains = not_implemented()
     get = not_implemented()