chore(markettakers): reorganize exports and add credits widget

lib/src/loader.dart

@@ -0,0 +1,77 @@
+import 'package:bloc/bloc.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:rive/rive.dart';
+
+enum LoaderFlavour {
+  small(filepath: 'assets/animations/loaders/small_loader.riv'),
+  big(filepath: 'assets/animations/big_loaders/big_logo_splash.riv');
+
+  const LoaderFlavour({required this.filepath});
+
+  final String filepath;
+}
+
+class LoaderController extends Cubit<bool> {
+  LoaderController() : super(false);
+
+  void show() => emit(true);
+  void hide() => emit(false);
+}
+
+class Loader extends HookWidget {
+  final LoaderFlavour flavour;
+  final Fit fit;
+  final LoaderController controller;
+
+  const Loader(
+    this.controller, {
+    super.key,
+    required this.flavour,
+    this.fit = Fit.contain,
+  });
+
+  Loader.playing({required LoaderFlavour flavour, Fit fit = Fit.contain})
+    : this(LoaderController()..show(), flavour: flavour, fit: fit);
+  Loader.stopped({required LoaderFlavour flavour, Fit fit = Fit.contain})
+    : this(LoaderController()..hide(), flavour: flavour, fit: fit);
+
+  @override
+  Widget build(BuildContext context) {
+  
+    final animFile = useMemoized(
+      () =>
+          FileLoader.fromAsset("packages/markettakers/${flavour.filepath}", riveFactory: Factory.flutter),
+    );
+
+    return RiveWidgetBuilder(
+      fileLoader: animFile,
+      builder: (context, state) {
+        switch (state) {
+          case RiveLoading():
+            return const Center(child: CircularProgressIndicator());
+
+          case RiveFailed():
+            final message = state.error.toString();
+            return ErrorWidget.withDetails(
+              message: message,
+              error: FlutterError(message),
+            );
+
+          case RiveLoaded(:final file):
+            final controller = RiveWidgetController(
+              file,
+              stateMachineSelector: StateMachineSelector.byIndex(0),
+            );
+            controller.active = this.controller.state;
+
+            this.controller.stream.listen((toggle) {
+              controller.active = toggle;
+            });
+
+            return RiveWidget(controller: controller, fit: fit);
+        }
+      },
+    );
+  }
+}