fix(Core/Spells): several improvements to cooldowns (#7559)

- Reworked spell category cooldowns.
- Implemented category cooldowns for pets.
- Properly shows pet spell cooldowns in player's UI.
- Corrected pet spell cooldowns with infinity duration.
- Do not add/remove infinity spell cooldown on aura apply/remove if casted by item.
- Closes #5263

src/server/shared/DataStores/DBCStructure.h

@@ -13,6 +13,7 @@
 #include "Util.h"
 #include <set>
 #include <map>
+#include <unordered_map>
 
 // Structures using to access raw DBC data and required packing to portability
 
@@ -1658,8 +1659,8 @@ struct SpellEntry
     //uint32  SpellDifficultyId;                            // 233      3.3.0
 };
 
-typedef std::set<uint32> SpellCategorySet;
-typedef std::map<uint32, SpellCategorySet > SpellCategoryStore;
+typedef std::set<std::pair<bool, uint32>> SpellCategorySet;
+typedef std::unordered_map<uint32, SpellCategorySet> SpellCategoryStore;
 typedef std::set<uint32> PetFamilySpellsSet;
 typedef std::map<uint32, PetFamilySpellsSet > PetFamilySpellsStore;