Move dart & flutter packages to packages folder on root

packages/dart/test/helpers.io.dart

@@ -0,0 +1,41 @@
+import 'dart:io';
+
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
+import 'package:breez_liquid/breez_liquid.dart';
+import 'package:path/path.dart' as p;
+
+final hostTriple = () {
+  final result = Process.runSync('rustc', const ['-vV']);
+
+  return (result.stdout as String)
+      .split('\n')
+      .firstWhere((line) => line.startsWith('host:'))
+      .split(':')
+      .last
+      .trim();
+}();
+
+extension on String {
+  String get dylib {
+    if (Platform.isWindows) {
+      return '$this.dll';
+    }
+    if (Platform.isMacOS) {
+      return 'lib$this.dylib';
+    }
+    return 'lib$this.so';
+  }
+}
+
+String dylibPath(String profile) => Uri.base
+    .resolve(p.joinAll([
+      '../../target',
+      if (Platform.isMacOS && hostTriple.startsWith('aarch64')) hostTriple,
+      profile,
+      'breez_liquid_sdk'.dylib,
+    ]))
+    .toFilePath();
+
+Future<void> initApi({String profile = 'debug'}) {
+  return initialize(dylib: ExternalLibrary.open(dylibPath(profile)));
+}