Bot does not handle max message length (65k chars)

[nickvergessen]

Could happen in very big calls

[nickvergessen]

Should chunk the string at 60k chars and then just send multiple messages in https://github.com/nextcloud/call_summary_bot/blob/167d81c5d9c830a188f67a08f38734e6cb210f18/lib/Controller/BotController.php#L160-L174 follow up chunks should quote the previous chunk, to ensure the order of them