François Mockers

crashing on examples because of #3502

> * I can see some users wanting to read AssetServerSettings at runtime (ex: AssetServerSettings::watch_for_changes, which currently only produces ephemeral / unqueryable state) > * I can see some plugins...

I moved "plugin uniqueness" to its own pr as it's two unrelated changes: #3988

> How can I change `setup resources` in runtime? How can I change fullscreen mode? You don't, that's pretty much the point

@alice-i-cecile I rebased this PR, it should be ready if you want to start the controversial timer

Added `ImageSettings`, it's only used on setup (#5744)

bors try

bors run was to check that config changes were correct it doesn't add much duration:

games don't, but a game server using Bevy could

That would be most welcomed! This PR should probably go in https://github.com/bevyengine/bevy/blob/main/crates/bevy_hierarchy/src/child_builder.rs. When working on hierarchy, the important thing to look out for is to not leave some entities in...