Add neighbor snapping. Add edge snapping. Change accent colors and logo colors, fix canvas history being transported when changing canvas.

types/general.d.ts

@@ -10,6 +10,6 @@ type MarkdownPreferences = {
     editing: 'split' |'reading' | 'editing';
 };
 type CanvasPreferences = {
-    snap: boolean;
-    size?: number;
+    gridSnap: boolean;
+    neighborSnap: boolean;
 };