Move apps to mobile directory structure

Relocated all app directories (client, design_system_viewer, staff) and their contents under the new 'apps/mobile' path. This change improves project organization and prepares for future platform-specific structuring.

apps/mobile/packages/features/staff/authentication/feature_manifest.md

@@ -0,0 +1,33 @@
+# Feature Manifest: Staff Authentication
+
+## Overview
+**Feature Name:** Staff Authentication & Onboarding
+**Package Path:** `packages/features/staff/authentication`
+
+## Responsibilities
+*   Handle user sign-up and log-in via Phone Auth.
+*   Verify OTP codes.
+*   Manage the Onboarding Wizard for new staff.
+*   Persist onboarding progress.
+
+## Architecture
+*   **Domain**:
+    *   `AuthRepositoryInterface`
+    *   `SignInWithPhoneUseCase`
+    *   `VerifyOtpUseCase`
+*   **Data**:
+    *   `AuthRepositoryImpl` (uses `AuthRepositoryMock` from `krow_data_connect`)
+*   **Presentation**:
+    *   `AuthBloc`: Manages auth state (phone, otp, user status).
+    *   `OnboardingBloc`: Manages wizard steps.
+    *   Pages: `GetStartedPage`, `PhoneVerificationPage`, `ProfileSetupPage`.
+
+## Dependencies
+*   `krow_domain`: User entities.
+*   `krow_data_connect`: Auth mocks.
+*   `design_system`: UI components.
+
+## Routes
+*   `/`: Get Started (Welcome)
+*   `/phone-verification`: OTP Entry
+*   `/profile-setup`: Onboarding Wizard