add exit mechanicm to each stage

remove types and moved struct to appropriate files

pkg/task/types.go

@@ -2,10 +2,13 @@ package task
 
 import (
 	"context"
+	"errors"
 
 	"github.com/LazyBachelor/LazyPM/internal/service"
 )
 
+var ErrUserQuit = errors.New("user quit")
+
 type TaskConfig = service.Config
 
 type Interface interface {