Improve subscription UI with large tier buttons

- Replace dropdown tier selection with attractive visual buttons
- Add tier-button CSS with hover effects and selection states
- Remove 'or pay by card' divider from subscription form for cleaner UI
- Update JavaScript to handle tier button selection events
- Fix Stripe module import conflict by renaming stripe directory to stripe_config
- Add responsive grid layout for tier buttons on mobile devices

stripe_config/.venv/lib/python3.12/site-packages/stripe/app_info.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+"""
+The stripe.app_info package is deprecated, please change your
+imports to import from stripe directly.
+From:
+  from stripe.app_info import AppInfo
+To:
+  from stripe import AppInfo
+"""
+
+from typing_extensions import TYPE_CHECKING
+
+# No deprecation warning is raised here, because it would happen
+# on every import of `stripe/__init__.py` otherwise. Since that
+# module declares its own `app_info` name, this module becomes
+# practically impossible to import anyway.
+
+if not TYPE_CHECKING:
+    from stripe._app_info import (  # noqa
+        AppInfo,
+    )