Transition.embed keeps view controllers in memory

[marionauta]

I was using ViewTransition.embed to change between fullscreen view controllers in my app, when I noticed the previous one was still in memory even if you can't see it (because a new one is fullscreen). For my use case, I want them gone!

I wrote an extension (named it switchTo) that adds a new transition that acts pretty much the same as embed but it removes all other children view controllers from the container, effectively removing them from memory.

I'm happy to submit a PR with this transition if it's something the project would find useful.

[pauljohanneskraft]

This is a nice addition - Thank you.
I will close this issue, since there is a pull request open already and we can discuss everything going forward over there.