Add setting to toggle scale grid visibility (#2838)

* Add a setting for showScaleGrid

* Fix up setting persistence, move under modeling

* Make the setting actually do something

* the lamest fmt I've seen in a while

* Fix clippy warnings

* Add snapshot tests for grid (first time using Playwright masks)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: ubuntu)

* Re-run CI after new screenshots added

---------

Co-authored-by: Jess Frazelle <jessfraz@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/components/ModelingMachineProvider.tsx

@@ -102,7 +102,7 @@ export const ModelingMachineProvider = ({
     settings: {
       context: {
         app: { theme, enableSSAO },
-        modeling: { defaultUnit, highlightEdges },
+        modeling: { defaultUnit, highlightEdges, showScaleGrid },
       },
     },
   } = useSettingsAuthContext()
@@ -117,6 +117,7 @@ export const ModelingMachineProvider = ({
     theme: theme.current,
     highlightEdges: highlightEdges.current,
     enableSSAO: enableSSAO.current,
+    showScaleGrid: showScaleGrid.current,
   })
   const { htmlRef } = useStore((s) => ({
     htmlRef: s.htmlRef,