Add NPC

[laasker]

Fixes #4

[Helias]

[ 20%] Building CXX object src/server/scripts/CMakeFiles/scripts.dir/Commands/cs_arena.cpp.o
/home/runner/work/mod-queue-list-cache/mod-queue-list-cache/modules/mod-queue-list-cache/src/QueueListNPC.cpp:23:63: fatal error: unused parameter 'creature' [-Wunused-parameter]
   23 | bool queue_list_npc::OnGossipSelect(Player* player, Creature* creature, uint32 /*uiSender*/, uint32 uiAction)
      |                                                               ^
1 error generated.
gmake[2]: *** [modules/CMakeFiles/modules.dir/build.make:118: modules/CMakeFiles/modules.dir/mod-queue-list-cache/src/QueueListNPC.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:1199: modules/CMakeFiles/modules.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....