Instance tables refactor part 6: unwrap VectorData and ImageFrame from single-row to multi-row tables (#2684)

* Start refactoring the boolean operations code

* Switch to iterators in the boolean operations code

* Make boolean operations work on rows of a table, not Vecs of single-row tables

* Remove more .transform()

* Simplify brush code

* Attempt to remove .transform() by using Instance<Image<Color>> in brush code, but a regression is introduced

* Improve blend_image_closure

* Simplify

* Remove leading underscore from type arguments

* Remove .transform() from ImageFrameTable<P> and fix Mask node behavior on stencils not fully overlapping its target image

* Remove more .one_instance_ref()

* Fully remove .one_instance_ref() and improve the 'Combine Channels' node robustness

* Fully remove .once_instance_mut()

* Fix tests

* Remove .one_empty_image()

* Make Instances<T>::default() return an empty table for images, but still not yet vector

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Co-authored-by: hypercube <0hypercube@gmail.com>

node-graph/gcore/src/logic.rs

@@ -6,7 +6,7 @@ use glam::{DAffine2, DVec2};
 fn log_to_console<T: core::fmt::Debug>(_: impl Ctx, #[implementations(String, bool, f64, u32, u64, DVec2, VectorDataTable, DAffine2, Color, Option<Color>)] value: T) -> T {
 	#[cfg(not(target_arch = "spirv"))]
 	// KEEP THIS `debug!()` - It acts as the output for the debug node itself
-	debug!("{:#?}", value);
+	log::debug!("{:#?}", value);
 	value
 }