Clean up node catalog by adding missing units, more tooltips; fix 'Line' node missing parameters (GraphiteEditor#2813)

* Fix unit usages

* Add node and parameter doc comments

* Fix the parameters panel for the 'Line' node when added from the graph

* Clean up nodes

* Fix tests

* Update the demo artwork

Author: Keavon

demo-artwork/changing-seasons.graphite

@@ -1016,7 +1016,9 @@ fn static_nodes() -> Vec<DocumentNodeDefinition> {
 					..Default::default()
 				},
 			},
-			description: Cow::Borrowed("TODO"),
+			description: Cow::Borrowed(
+				"Decomposes the X and Y components of a 2D coordinate.\n\nThe inverse of this node is \"Coordinate Value\", which can have either or both its X and Y exposed as graph inputs.",
+			),
 			properties: None,
 		},
 		// TODO: Remove this and just use the proto node definition directly
@@ -1856,7 +1858,7 @@ fn static_nodes() -> Vec<DocumentNodeDefinition> {
 									NodeInput::network(concrete!(graphene_std::vector::VectorDataTable), 0),
 									NodeInput::network(concrete!(vector::misc::PointSpacingType), 1),
 									NodeInput::network(concrete!(f64), 2),
-									NodeInput::network(concrete!(f64), 3),
+									NodeInput::network(concrete!(u32), 3),
 									NodeInput::network(concrete!(f64), 4),
 									NodeInput::network(concrete!(f64), 5),
 									NodeInput::network(concrete!(bool), 6),
@@ -1895,7 +1897,7 @@ fn static_nodes() -> Vec<DocumentNodeDefinition> {
 						NodeInput::value(TaggedValue::VectorData(graphene_std::vector::VectorDataTable::default()), true),
 						NodeInput::value(TaggedValue::PointSpacingType(Default::default()), false),
 						NodeInput::value(TaggedValue::F64(100.), false),
-						NodeInput::value(TaggedValue::F64(100.), false),
+						NodeInput::value(TaggedValue::U32(100), false),
 						NodeInput::value(TaggedValue::F64(0.), false),
 						NodeInput::value(TaggedValue::F64(0.), false),
 						NodeInput::value(TaggedValue::Bool(false), false),

demo-artwork/isometric-fountain.graphite

@@ -1427,6 +1427,7 @@ pub(crate) fn rectangle_properties(node_id: NodeId, context: &mut NodeProperties
 		} else {
 			NumberInput::default()
 				.value(Some(uniform_val))
+				.unit(" px")
 				.on_update(update_value(move |x: &NumberInput| TaggedValue::F64(x.value.unwrap()), node_id, CornerRadiusInput::<f64>::INDEX))
 				.on_commit(commit_value)
 				.widget_holder()