feature #47373 [Notifier] Add Chatwork Notifier Bridge (Ippey)

This PR was squashed before being merged into the 6.2 branch.

Discussion
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[Notifier] Add Chatwork Notifier Bridge

| Q             | A
| ------------- | ---
| Branch?       | 6.2
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| License       | MIT

Add Chatwork Notifier Bridge.

[Chatwork](https://go.chatwork.com/) is one of the popular chat tools in Japan.
This bridge allows sending messages to Chatwork via [Chatwork API](https://developer.chatwork.com/docs).

Commits
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6dcab51f3f [Notifier] Add Chatwork Notifier Bridge

Author: fabpot

Transport.php

@@ -13,6 +13,7 @@
 
 use Symfony\Component\Notifier\Bridge\AllMySms\AllMySmsTransportFactory;
 use Symfony\Component\Notifier\Bridge\AmazonSns\AmazonSnsTransportFactory;
+use Symfony\Component\Notifier\Bridge\Chatwork\ChatworkTransportFactory;
 use Symfony\Component\Notifier\Bridge\Clickatell\ClickatellTransportFactory;
 use Symfony\Component\Notifier\Bridge\ContactEveryone\ContactEveryoneTransportFactory;
 use Symfony\Component\Notifier\Bridge\Discord\DiscordTransportFactory;
@@ -73,6 +74,7 @@ final class Transport
     private const FACTORY_CLASSES = [
         AllMySmsTransportFactory::class,
         AmazonSnsTransportFactory::class,
+        ChatworkTransportFactory::class,
         ClickatellTransportFactory::class,
         ContactEveryoneTransportFactory::class,
         DiscordTransportFactory::class,