Add TelegramBotHandler topics support

[bernard-ng]

This PR adds support for the topic option in TelegramBotHandler, enabling the use of the Telegram message thread ID (message_thread_id). This unique identifier targets specific message threads (topics) within forum supergroups.

Reference:

• TelegramBotHandler topics support Seldaek/monolog#1802
• How to get the message_thread_id

[bernard-ng]

@stof sorry for the ping, could you assist please ?

CI for PHP 7.4 fails with :

Required package "symfony/phpunit-bridge" is not present in the lock file.
This usually happens when composer files are incorrectly merged or the composer.json file is manually edited.
Read more about correctly resolving merge conflicts https://getcomposer.org/doc/articles/resolving-merge-conflicts.md
and prefer using the "require" command over editing the composer.json file directly https://getcomposer.org/doc/03-cli.md#require-r
Error: Process completed with exit code 4.

Is there any actions on my side to make theses workflows green ?