Feat(LuaEngine/SpellInfo): Add SpellInfo class and methods

[iThorgrim]

This pull request introduces SpellInfo API in mod-Eluna. With the addition of numerous new methods, this update provides developers with enhanced flexibility and control over spell-related interactions.

Key Highlights

1. Localization Support:

   • GetName: Retrieve spell names in different locales, making localization more accessible.

2. Attributes and Mechanics:

   • HasAttribute: Check if a spell has a specific attribute.
   • GetAttributes: Retrieve all attributes of a spell.
   • IsAffectingArea: Determine if a spell affects an area (AoE).
   • GetCategory: Retrieve the spell’s category.
   • IsPositive / IsPositiveEffect: Identify whether a spell or its effects are beneficial.

3. Targeting Enhancements:

   • CheckTarget and CheckExplicitTarget: Validate if a target meets the requirements for a spell.
   • NeedsExplicitUnitTarget: Check if a spell requires a specific target.
   • IsTargetingArea: Verify if a spell targets an area.

4. Aura and Effect Insights:

   • HasAura / HasEffect: Check for specific auras or effects.
   • HasAreaAuraEffect: Validate if a spell has an area-based aura.
   • IsAuraExclusiveBySpecificWith: Ensure exclusivity of an aura.

5. Profession and Skill Integration:

   • Methods such as IsProfession, IsPrimaryProfession, and IsAbilityLearnedWithProfession enhance interactions with professions and skills.

6. Miscellaneous Features:

   • IsPassive: Determine if a spell is passive.
   • IsChanneled: Identify channeled spells.
   • NeedsComboPoints: Check if a spell requires combo points.
   • IsSelfCast: Validate self-casting spells.

7. Advanced Mechanics:

   • CanPierceImmuneAura and CanDispelAura: Manage interactions with immune or dispellable auras.
   • CheckLocation: Verify if a spell can be used in a specific map, zone, or area.
   • GetSchoolMask: Retrieve the school of magic associated with a spell.