chore: move sandbox to apps/ (#1171)

apps/sandbox/app/shared/html/tailwind-setup.ts

@@ -0,0 +1,8 @@
+import tailwindCSS from '@app/styles.css?inline';
+
+const tailwindStyles = new CSSStyleSheet();
+tailwindStyles.replaceSync(tailwindCSS);
+
+export function getTailwindStyles(): CSSStyleSheet {
+  return tailwindStyles;
+}