An example demonstrating automatic and manual extraction of components
from the Main World to the Render World.
This is a common point of confusion for new users that want to do custom
rendering, and I don't think any of the current examples show how to
manually extract components (or aren't at all focused on it at least).
In the future this should probably be changed to be about extraction
between two arbitrary worlds, instead of being specific to the Render
World. Possibly after / if github.com/bevyengine/bevy/pull/22852 is
merged.
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Co-authored-by: Chris Biscardi <chris@christopherbiscardi.com>