feat(send): animated hash-bag on the "Transaction Sent" screen

Replace the static success illustration with HashBagSuccessAnimation: the money
sack sits at the bottom and #/$/₿ glyphs erupt from its mouth, rising and fading
on a loop. Glyphs are PNG assets (the app bundles no font with a ₿ glyph).

InfoPage gains an overridable buildIllustration() hook (default unchanged:
static HashImageWidget); only TransactionSuccessPage overrides it, so every
other InfoPage is untouched.

NOTE: written without a local Flutter build (Dart pub can't resolve here) —
verify on the next CI/device build. Self-contained and revertible; the static
hash_bag.png remains the fallback via imageLightPath/imageDarkPath.

lib/src/screens/send/transaction_success_info_page.dart

@@ -1,5 +1,6 @@
 import 'package:hash_wallet/generated/i18n.dart';
 import 'package:hash_wallet/src/screens/Info_page.dart';
+import 'package:hash_wallet/src/widgets/hash_bag_success_animation.dart';
 import 'package:flutter/cupertino.dart';
 
 class TransactionSuccessPage extends InfoPage {
@@ -11,6 +12,10 @@ class TransactionSuccessPage extends InfoPage {
 
   final String content;
 
+  @override
+  Widget buildIllustration(BuildContext context, String image) =>
+      const HashBagSuccessAnimation();
+
   @override
   bool get onWillPop => false;