Weapon Skill Refactor

[TheGroxEmpire]

• Weapon Skills are now correctly implemented for each weapon slot
• Attack Tables now are 2 dimensional (AttackTables[UnitIndex][CastType]). First dimension is UnitIndex, second dimension is the CastType.
• CastType is the slot in which spell is cast from. There are three types of CastType: CastTypeMainHand, CastTypeOffHand, CastTypeRanged
• Spells are in default cast from CastTypeMainHand
• Spells CastType can be adjusted with SpellConfig
• Added Wowhead tooltip parsing for weapon skills

Note to other Class Developers:

• Please make sure to change your spell CastType if needed. Most Classes shouldn't be affected as most spells are from MainHand (this is the default Attack Table as before). However, class that has spells that are being cast from ranged or offhand such as Hunter should update those spells CastType accordingly.

[kayla-glick]

Tentative approval because attack tables still go above my head 😅