adds setting for always snaps to grid

resolves #32

js/snapToGrid.js

@@ -0,0 +1,27 @@
+import { app } from "/scripts/app.js";
+
+const id = "pysssss.SnapToGrid";
+const ext = {
+	name: id,
+	async setup(app) {
+		app.ui.settings.addSetting({
+			id,
+			name: "🐍 Always snap to grid",
+			defaultValue: false,
+			type: "boolean",
+			onChange(value) {
+				app.canvas.align_to_grid = value;
+			},
+		});
+		const origDrawNode = LGraphCanvas.prototype.drawNode;
+		LGraphCanvas.prototype.drawNode = function () {
+			const shift = app.shiftDown;
+			app.shiftDown = true; // Force it to draw the drop position
+			const r = origDrawNode.apply(this, arguments);
+			app.shiftDown = shift;
+            return r;
+		};
+	},
+};
+
+app.registerExtension(ext);