refactor(guest): retire legacy guest app and move shared modules

resources/js/guest-v2/__tests__/SettingsSheet.test.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { describe, expect, it, vi } from 'vitest';
 import { render, screen } from '@testing-library/react';
 
-vi.mock('@/guest/i18n/useTranslation', () => ({
+vi.mock('@/shared/guest/i18n/useTranslation', () => ({
   useTranslation: () => ({ t: (_key: string, fallback?: string) => fallback ?? _key }),
 }));
 
@@ -10,11 +10,11 @@ vi.mock('@/hooks/use-appearance', () => ({
   useAppearance: () => ({ resolved: 'dark' }),
 }));
 
-vi.mock('@/guest/i18n/LocaleContext', () => ({
+vi.mock('@/shared/guest/i18n/LocaleContext', () => ({
   useLocale: () => ({ locale: 'de' }),
 }));
 
-vi.mock('@/guest/components/legal-markdown', () => ({
+vi.mock('@/shared/guest/components/legal-markdown', () => ({
   LegalMarkdown: () => <div>Legal markdown</div>,
 }));