all: use %w instead of %v to wrap errors (#1275)

* all: use %w instead of %v for nested errors with fmt.Errorf

* all: update generated code to use %w instead of %v for error wrapping

examples/start/ent/user_query.go

@@ -482,7 +482,7 @@ func (uq *UserQuery) sqlAll(ctx context.Context) ([]*User, error) {
 			},
 		}
 		if err := sqlgraph.QueryEdges(ctx, uq.driver, _spec); err != nil {
-			return nil, fmt.Errorf(`query edges "groups": %v`, err)
+			return nil, fmt.Errorf(`query edges "groups": %w`, err)
 		}
 		query.Where(group.IDIn(edgeids...))
 		neighbors, err := query.All(ctx)
@@ -511,7 +511,7 @@ func (uq *UserQuery) sqlCount(ctx context.Context) (int, error) {
 func (uq *UserQuery) sqlExist(ctx context.Context) (bool, error) {
 	n, err := uq.sqlCount(ctx)
 	if err != nil {
-		return false, fmt.Errorf("ent: check existence: %v", err)
+		return false, fmt.Errorf("ent: check existence: %w", err)
 	}
 	return n > 0, nil
 }