refactor(mobile): build context extensions (#4923)

* refactor: move all extensions to separate package

* refactor(mobile): add BuildContext extension

* refactor(mobile): use theme getters from context

* refactor(mobile): use media query size from context

* refactor(mobile): use auto router methods from context

* refactor(mobile): use navigator methods from context

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Co-authored-by: shalong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/modules/partner/ui/partner_list.dart

@@ -1,6 +1,6 @@
-import 'package:auto_route/auto_route.dart';
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/routing/router.dart';
 import 'package:immich_mobile/shared/models/user.dart';
 import 'package:immich_mobile/shared/ui/user_avatar.dart';
@@ -28,10 +28,10 @@ class PartnerList extends HookConsumerWidget {
         style: TextStyle(
           fontWeight: FontWeight.bold,
           fontSize: 14,
-          color: Theme.of(context).primaryColor,
+          color: context.primaryColor,
         ),
       ),
-      onTap: () => AutoRouter.of(context).push(PartnerDetailRoute(partner: p)),
+      onTap: () => context.autoPush((PartnerDetailRoute(partner: p))),
     );
   }
 }