Rename the repeat nodes to replace "Instance" terminology with "Repeat" (#3794)

* WIP

* Move the Mirror node from the module 'vector' to 'graphic'

* Update demo art

* Fix failing tests

Fix tests

node-graph/nodes/gstd/src/lib.rs

@@ -14,6 +14,7 @@ pub use graphic_types::{Artboard, Graphic, Vector};
 pub use math_nodes;
 pub use path_bool_nodes as path_bool;
 pub use raster_nodes;
+pub use repeat_nodes;
 pub use text_nodes;
 pub use transform_nodes;
 pub use vector_nodes;
@@ -64,6 +65,10 @@ pub mod transform {
 	pub use vector_types::ReferencePoint;
 }
 
+pub mod repeat {
+	pub use repeat_nodes::repeat_nodes::*;
+}
+
 pub mod math {
 	pub use core_types::math::quad;