Add AdventureBot groups, raid preparation and shared travel

Implement native bot recruitment and player admission, leader-owned destinations, intent-specific capacities, preparation scheduling and shared graph and flight travel. Support native group instance visits and separate raid entrances.

Include pending personality-driven faction PvP and solo fleeing, preserving the absolute group fleeing exclusion. Add regression fixtures, migration, documentation and test-server evidence.

src/server/game/World/ClientlessLuaEngine.cpp

@@ -6,6 +6,7 @@
 #include "AdventureBehaviorMgr.h"
 #include "AdventureCombatMgr.h"
 #include "AdventureInteractionMgr.h"
+#include "AdventureGroupMgr.h"
 #include "AdventureGeneratorMgr.h"
 #include "AdventureSupplyMgr.h"
 #include "AdventureSocialActions.h"
@@ -230,6 +231,8 @@ public:
     }
     void OnSharedTargetDamage(Player* player,ObjectGuid helper,ObjectGuid target) override
     { sAdventureCombatMgr->SharedTargetDamage(player,helper,target); }
+    void OnGroupJoinRequest(Player* player,Player* requester) override
+    {sAdventureGroupMgr->RequestPlayerAdmission(player,requester);}
     void OnTextEmote(Player* player, Player* source, uint32 emote) override
     { sAdventureInteractionMgr->Emote(player,source,emote); }
     void OnDamageTaken(Player* player, Unit* attacker, uint32 damage) override