[REFACTORING] Add routines

[slashformotion]

Badaas needs some to run some code periodically, such as the session cache refresh function.

I propose to create an interface

type Routine interface {
    // Start the routine
    Start() error
    // Stop the routines
   Stop() error
    // Return the name of the routine. 
    Name() string
}

since we use https://github.com/uber-go/fx it should be easy to create a lifecycle hook that manage collected routines.

func StartRoutine(lc fx.Lifecycle, routines []Routine)  {
  
  lc.Append(fx.Hook{
    OnStart: func(ctx context.Context) error {
      for routine := range routines {
        err := routine.Start()
        if err != nil {
          return fmt.Errorf("en error happened while starting routine %q. error=%w", routine.Name(), err)
        }
      }
      return nil
    },
    OnStop: func(ctx context.Context) error {
      for routine := range routines {
        err := routine.Stop()
        if err != nil {
          return fmt.Errorf("en error happened while stopping routine %q. error=%w", routine.Name(), err)
        }
      }
    },
  })
}