change file structure, replace rate_limit with the pub dependency

Signed-off-by: Sahil Kumar <[email protected]>

packages/stream_chat/lib/src/client/retry_policy.dart

@@ -0,0 +1,31 @@
+import 'package:stream_chat/src/client/client.dart';
+import 'package:stream_chat/src/core/error/error.dart';
+
+/// The retry options
+class RetryPolicy {
+  /// Instantiate a new RetryPolicy
+  RetryPolicy({
+    required this.shouldRetry,
+    required this.retryTimeout,
+    this.maxRetryAttempts = 6,
+  });
+
+  /// Hard limit on maximum retry attempts before giving up, defaults to 6
+  /// Resets once connection recovers.
+  final int maxRetryAttempts;
+
+  /// This function evaluates if we should retry the failure
+  final bool Function(
+    StreamChatClient client,
+    int attempt,
+    StreamChatError? error,
+  ) shouldRetry;
+
+  /// In the case that we want to retry a failed request the retryTimeout
+  /// method is called to determine the timeout
+  final Duration Function(
+    StreamChatClient client,
+    int attempt,
+    StreamChatError? error,
+  ) retryTimeout;
+}