Add Prettier and ESLint tooling (Refs #77)

src/lib/ui/dialog.ts

@@ -1,6 +1,14 @@
 /** Native dialogs also receive clicks in their padding; only clicks beyond the bounds dismiss. */
-export function isDialogBackdrop(event: MouseEvent, dialog: HTMLDialogElement | null | undefined): boolean {
+export function isDialogBackdrop(
+    event: MouseEvent,
+    dialog: HTMLDialogElement | null | undefined
+): boolean {
     if (!dialog || event.target !== dialog) return false;
     const rect = dialog.getBoundingClientRect();
-    return event.clientX < rect.left || event.clientX > rect.right || event.clientY < rect.top || event.clientY > rect.bottom;
+    return (
+        event.clientX < rect.left ||
+        event.clientX > rect.right ||
+        event.clientY < rect.top ||
+        event.clientY > rect.bottom
+    );
 }