New node: Color Overlay (#1391)

* [wip]feat: implement Color Overlay node's base logic

* [wip]feat: attempt implementing node

* feat: implement naive node logic
- this needs to accommodate coloring the image

* [wip]feat: attempt implementing ColorFillNode

* fix: color fill node implementation path

* Simplify document node definition

* [wip]feat: implement ColorFillNode

- correct the node implementation logic
-[wip]use node in Color Overlay node network

* Remove secondary image input

* chore: perform cleanup and minor optimization

- rename ColorFillNode node to Color Fill
- remove unneeded clone method call

* refactor: optimize node logic and hide optional params

* fix: color fill implementation
- fix broken color fill implementation logic
- add alpha multiplication data to the image

* Fix colour overlay node

* Blend mode

* chore: remove unused import

* Debug logging for overlay

* Use premultiplied alpha

* Comment out logging

* Code review nits

* Remove color debug logging

---------

Co-authored-by: Dennis Kobert <dennis@kobert.dev>
Co-authored-by: 0hypercube <0hypercube@gmail.com>
Co-authored-by: Keavon Chambers <keavon@keavon.com>

node-graph/gcore/Cargo.toml

@@ -31,6 +31,7 @@ bytemuck = { version = "1.8", features = ["derive"] }
 async-trait = { version = "0.1", optional = true }
 serde = { version = "1.0", features = [
 	"derive",
+	"rc"
 ], optional = true, default-features = false }
 log = { version = "0.4", optional = true }