完成mvvm模式下，画布、节点编辑的基本重构

.claudiaideconfig

@@ -0,0 +1,49 @@
+{
+  "BackgroundImageAbsolutePath": "C:\\Users\\Az\\Pictures\\anime_girl_brunette1.png",
+  "BackgroundImagesDirectoryAbsolutePath": "c:\\users\\az\\appdata\\local\\microsoft\\visualstudio\\17.0_a4315dfe\\extensions\\mtri5ge5.xs4\\Images",
+  "BlurMethod": 0,
+  "BlurRadius": 0,
+  "EditorBackgroundColor": "",
+  "EditorBackgroundColorObject": null,
+  "ExpandToIDE": false,
+  "Extensions": ".png, .jpg, .gif, .bmp",
+  "ImageBackgroundType": 0,
+  "ImageFadeAnimationInterval": "PT5S",
+  "ImageStretch": 0,
+  "IncludeSubdirectories": false,
+  "IsLimitToMainlyEditorWindow": false,
+  "IsTransparentToContentMargin": false,
+  "IsTransparentToStickyScroll": false,
+  "LoopSlideshow": true,
+  "MaxHeight": 0,
+  "MaxWidth": 0,
+  "Opacity": 0.1,
+  "PositionHorizon": 1,
+  "PositionVertical": 1,
+  "ShuffleSlideshow": false,
+  "SoftEdgeX": 0,
+  "SoftEdgeY": 0,
+  "StickyScrollColor": "#00000000",
+  "StickyScrollColorObject": {
+    "A": 0,
+    "B": 0,
+    "G": 0,
+    "R": 0,
+    "ScA": 0,
+    "ScB": 0,
+    "ScG": 0,
+    "ScR": 0
+  },
+  "TileMode": 0,
+  "UpdateImageInterval": "PT1M",
+  "ViewBoxPointX": 0,
+  "ViewBoxPointY": 0,
+  "ViewPortHeight": 1,
+  "ViewPortPointX": 0,
+  "ViewPortPointY": 0,
+  "ViewPortWidth": 1,
+  "WebApiDownloadInterval": "PT5M",
+  "WebApiEndpoint": "",
+  "WebApiJsonKey": "",
+  "WebSingleUrl": ""
+}