fix: While a text event starts which changes the portrait, the new character portrait scene is created after the signal text_started is emited

[cliveglitch]

This fix just awaits the change_speaker and change_character_portrait calls so it instantiates the new character portrait scene before the calling the text_started and about_to_show_text signals.

I think it makes more sense if when changing the portrait, the latest portrait character scene is there to receive the signal.

[Jowan-Spooner]

Thanks! It makes sense, but I will have to test this a bit before I feel comfortable, the text event is so damn finicky, reordering/retiming things like this usually mess something up 😭.

[cliveglitch]

I understand, I don't know if there's a way in gdscript to await the portrait changes just before emitting the signals, kinda like using Javascript Promises, you run them and save the promise in a variable and await it when you need it... that could be an alternative if it breaks something.