Add automatic ticket reminder system (configurable ping for overdue replies)

[Sayrix]

Is your feature request related to a problem? Please describe.
Currently, the Ticket-Bot does not send automatic reminders if a support agent or user has not replied in a timely manner. This leads to tickets being unintentionally delayed or forgotten, affecting response times and overall user satisfaction, especially when support or users become unresponsive.

Describe the solution you'd like
Implement an automatic ticket reminder feature in the bot:

• If support does not reply within a configurable time (e.g., 12 hours) after the last message, the bot should automatically re-ping/ping the support team.
• If the user does not reply within the specified time after a support reply, the bot should ping the user as a reminder.
• The reminder interval (e.g., 12 hours) must be configurable per server or ticket type.
• The system should avoid spamming and only send one reminder per wait period.
• Include configuration options to turn reminders off for certain tickets or user roles.

Describe alternatives you've considered

• Manual tracking and follow-up by staff, but this is inconsistent and doesn't scale for many tickets.
• External reminder bots, but integrating this directly into Ticket-Bot offers a smoother experience.

Additional context
A built-in reminder system increases response rates and ensures no ticket is forgotten, creating a better user experience for both support and end users.