Copy-paste commands across timelines

### Describe the project you are working on

Visual Novel

### Describe the feature / enhancement and how it helps to overcome the problem or limitation

If you call similar commands from multiple timelines, it's kind of annoying having to remake it from scratch every time. Being able to copy-paste commands across the timelines would save a lot of time.

### Adittional information

Before templates are added you could even create a dummy timeline where you copy-paste all of your common commands into as well to use as one