feat: Implement permanent and recurring order features with BLoC architecture

- Added PermanentOrderEvent and PermanentOrderState to manage permanent order events and states.
- Created RapidOrderBloc, RapidOrderEvent, and RapidOrderState for handling rapid order creation.
- Introduced RecurringOrderBloc, RecurringOrderEvent, and RecurringOrderState for managing recurring orders.
- Developed utility classes for order types and UI metadata for styling order type cards.
- Enhanced validation logic for order states to ensure data integrity.
- Integrated vendor and hub loading functionalities for both permanent and recurring orders.

apps/mobile/packages/design_system/lib/src/ui_typography.dart

@@ -221,6 +221,14 @@ class UiTypography {
     color: UiColors.textPrimary,
   );
 
+  /// Headline 4 Bold - Font: Instrument Sans, Size: 20, Height: 1.5 (#121826)
+  static final TextStyle headline4b = _primaryBase.copyWith(
+    fontWeight: FontWeight.w600,
+    fontSize: 18,
+    height: 1.5,
+    color: UiColors.textPrimary,
+  );
+
   /// Headline 5 Regular - Font: Instrument Sans, Size: 18, Height: 1.5 (#121826)
   static final TextStyle headline5r = _primaryBase.copyWith(
     fontWeight: FontWeight.w400,

apps/mobile/packages/design_system/lib/src/widgets/ui_app_bar.dart

@@ -1,3 +1,4 @@
+import 'package:design_system/src/ui_typography.dart';
 import 'package:flutter/material.dart';
 
 import '../ui_icons.dart';
@@ -14,7 +15,7 @@ class UiAppBar extends StatelessWidget implements PreferredSizeWidget {
     this.leading,
     this.actions,
     this.height = kToolbarHeight,
-    this.centerTitle = true,
+    this.centerTitle = false,
     this.onLeadingPressed,
     this.showBackButton = true,
     this.bottom,
@@ -56,6 +57,7 @@ class UiAppBar extends StatelessWidget implements PreferredSizeWidget {
           (title != null
               ? Text(
                   title!,
+                  style: UiTypography.headline4b,
                 )
               : null),
       leading: leading ??