feat: add devtools (WIP)

packages/fl_query/lib/src/collections/refresh_config.dart

@@ -58,4 +58,13 @@ class RefreshConfig {
           refreshOnQueryFnChange ?? this.refreshOnQueryFnChange,
     );
   }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'staleDuration': staleDuration.toString(),
+      'refreshInterval': refreshInterval.toString(),
+      'refreshOnMount': refreshOnMount,
+      'refreshOnQueryFnChange': refreshOnQueryFnChange,
+    };
+  }
 }

packages/fl_query/lib/src/collections/retry_config.dart

@@ -38,4 +38,11 @@ class RetryConfig {
       retryDelay: retryDelay ?? this.retryDelay,
     );
   }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'maxRetries': maxRetries,
+      'retryDelay': retryDelay.toString(),
+    };
+  }
 }