refactor(client): move sendReaction method to the Client (#201695)

`Message.react` moved to `Client.sendReaction`

index.d.ts

@@ -210,6 +210,12 @@ declare namespace WAWebJS {
             options?: MessageSendOptions,
         ): Promise<Message>;
 
+        /** Send a reaction to a specific messageId */
+        sendReaction(
+            messageId: string,
+            reaction: string,
+        ): Promise<void>;
+
         /** Sends a channel admin invitation to a user, allowing them to become an admin of the channel */
         sendChannelAdminInvite(
             chatId: string,