* Handling the maximum length of a Telegram message
The maximum allowed length of a Telegram message - 4096 symbols (https://core.telegram.org/bots/api#message, 'text' field).
Longer messages are not delivered.
Therefore, I implemented splitting too long message into several (with a 1 second delay between sending according to the documentation - https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-how-do-i-avoid-this) as the default behavior.
An additional option that you can enable by truncateLongMessage is to leave one message, but truncate it to the maximum length allowed.
* Changed handling of long messages (default - truncation, delay - optional)
* PSR-12 code formatting
* Added support for working with BufferHandler
Added `handleBatch` method for TelegramBotHandler and fixed `write` method.
This is necessary to work with BufferHandler, OverflowHandler etc.
Parameters `$level` and `$bubble` are already passed to parent constructor, no need to set them again.
Also setting `$level` without `setLevel()` makes it incomparable as it is not converted to int via `Logger::toMonologLevel()`.
