Possibility to add a break during the knockout

[Voyager006]

This can be done by extending the chat time for a single track. Usage will probably be /break <duration> or /ko break <duration> which sets the chat time for the current map only. Use GetChatTime with CurrentValue set to duration.

This involves adding state; the chat time must be reset to its original value once the podium is entered.

May be implemented in xcommands plugin (separately from the knockout plugin), but this would lose the ability to set a custom knockout status for the break.