feat(redis_client): add logging support

packages/redis_client/example/main.dart

@@ -1,5 +1,3 @@
-import 'dart:async';
-
 import 'package:redis_client/redis_client.dart';
 
 Future<void> main() async {
@@ -9,24 +7,9 @@ Future<void> main() async {
   // Connect to the Redis server.
   await client.connect();
 
-  const key = 'HELLO';
-
-  final initialValue = await client.get(key: key); // null
-  assert(initialValue == null, 'Key should not exist.');
-
-  // Set the value of a key.
-  await client.set(key: key, value: 'WORLD');
-
-  // Get the value of a key.
-  final value = await client.get(key: key); // WORLD
-  assert(value == 'WORLD', 'Value should be "WORLD".');
-
-  // Delete the key.
-  await client.delete(key: key);
-
-  final finalValue = await client.get(key: key); // null
-  assert(finalValue == null, 'Key should not exist.');
+  // Execute a command.
+  await client.execute(['PING']); // PONG
 
-  // Close the connection to the Redis server.
+  // Close the connection.
   await client.close();
 }

packages/redis_client/lib/redis_client.dart

@@ -1,2 +1,8 @@
 export 'src/redis_client.dart'
-    show RedisClient, RedisCommandOptions, RedisJson, RedisSocketOptions;
+    show
+        RedisClient,
+        RedisCommandOptions,
+        RedisException,
+        RedisJson,
+        RedisLogger,
+        RedisSocketOptions;