[2995] Implement script support for quest 3367.

Please note that there might be many details on this event which are currently missing.

Close #96
[2996] Implement script support for quest 9729

Part of #27
[2997] Implement script support for quest 9879

This will use the same base code as quest 9868.
Also, please note that this commit involves a lot of guesswork.

Part of #27
[2998] Implement script support for quest 11085

Please note that this will only support one spawn location of the escorted NPC. The other escort paths will be added once the database will have proper spawn locations.

Part of #27
[2999] Implement script support for quest 11673

Part of #27