Move filter nodes into separate namespace/folder and rename KernelNode to KernelFilterNode

src/PixiEditor.ChangeableDocument/Changeables/Graph/Nodes/ApplyFilterNode.cs → src/PixiEditor.ChangeableDocument/Changeables/Graph/Nodes/FilterNodes/ApplyFilterNode.cs

@@ -2,7 +2,7 @@
 using PixiEditor.ChangeableDocument.Rendering;
 using PixiEditor.DrawingApi.Core.Surface.PaintImpl;
 
-namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes;
+namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes.FilterNodes;
 
 public class ApplyFilterNode : Node
 {

src/PixiEditor.ChangeableDocument/Changeables/Graph/Nodes/FilterNode.cs → src/PixiEditor.ChangeableDocument/Changeables/Graph/Nodes/FilterNodes/FilterNode.cs

@@ -1,7 +1,7 @@
 using PixiEditor.ChangeableDocument.Rendering;
 using PixiEditor.DrawingApi.Core.Surface.PaintImpl;
 
-namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes;
+namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes.FilterNodes;
 
 public abstract class FilterNode : Node
 {

src/PixiEditor.ChangeableDocument/Changeables/Graph/Nodes/KernelNode.cs → src/PixiEditor.ChangeableDocument/Changeables/Graph/Nodes/FilterNodes/KernelFilterNode.cs

@@ -1,10 +1,8 @@
-using PixiEditor.ChangeableDocument.Rendering;
-using PixiEditor.DrawingApi.Core.Surface;
-using PixiEditor.DrawingApi.Core.Surface.ImageData;
+using PixiEditor.DrawingApi.Core.Surface;
 using PixiEditor.DrawingApi.Core.Surface.PaintImpl;
 using PixiEditor.Numerics;
 
-namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes;
+namespace PixiEditor.ChangeableDocument.Changeables.Graph.Nodes.FilterNodes;
 
 public class KernelFilterNode : FilterNode
 {