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/group_query.go

@@ -416,7 +416,7 @@ func (gq *GroupQuery) sqlAll(ctx context.Context) ([]*Group, error) {
 			},
 		}
 		if err := sqlgraph.QueryEdges(ctx, gq.driver, _spec); err != nil {
-			return nil, fmt.Errorf(`query edges "users": %v`, err)
+			return nil, fmt.Errorf(`query edges "users": %w`, err)
 		}
 		query.Where(user.IDIn(edgeids...))
 		neighbors, err := query.All(ctx)
@@ -445,7 +445,7 @@ func (gq *GroupQuery) sqlCount(ctx context.Context) (int, error) {
 func (gq *GroupQuery) sqlExist(ctx context.Context) (bool, error) {
 	n, err := gq.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
 }