flutter(rider): rebuild lib on Cubit/Bloc + Tripz backend (core + auth slice)

- keep store identity (com.mobileapp.store.ride, shorebird, firebase, fonts); old lib -> lib_old_getx
- core: config/di/router(go_router)/theme/api_client(dio+tenant+bearer)/token_store(secure)
- auth: repo + AuthCubit + OTP phone/otp screens; home: flutter_map (OSM placeholder, انطلق TODO)
- android usesCleartextTraffic=true for http API; maps=flutter_map (no Google), state=Cubit

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/rider/lib/core/theme.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+/// ثيم Tripz — أساس بسيط، خط عربي (mohanad) وألوان.
+ThemeData buildTheme() {
+  const seed = Color(0xFF0E7C66); // أخضر تركوازي
+  return ThemeData(
+    useMaterial3: true,
+    colorScheme: ColorScheme.fromSeed(seedColor: seed),
+    fontFamily: 'mohanad',
+    inputDecorationTheme: const InputDecorationTheme(
+      border: OutlineInputBorder(),
+      contentPadding: EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+    ),
+    filledButtonTheme: FilledButtonThemeData(
+      style: FilledButton.styleFrom(
+        minimumSize: const Size.fromHeight(52),
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+      ),
+    ),
+  );
+}