Allow inputting NodePaths that don't yet exist

### 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 want to call on a scene's function that will only exist at runtime (such as adding a new character and calling a func on it), there's no way to target it atm using the "Target" inspector property. The current workaround is to create the scene, target it, then delete the scene. There should be a better way.

### Adittional information

_No response_