[Spells] Implemented SPA 476 SE_Weapons_Stance and Live-like AA Enable/Disable Toggle (#1477)

* Work started on SPA 476

defines

* bonus structure add

bonus structure set up

* updates spa476

updates spa476

* spell bonus now functional

spell bonus working well.

* major update with debug messages

aa, item and spell now working

* Pre clean up, effect implemented

working for AA, spells, items, all checked for stacking issues.

* removed debug messages

removed debug messages

* spdat description added

spdat description added

* minor fix

removed debug shout
removed unneeded code check.

* syntax updates, minor fixes

syntax updates, minor fixes

* syntax fixes

syntax fixes

* improvements to code

moved function to check at swap item.  Easier to manage and more live like behavior. Required minor adjustment
Still working on AA toggle.

* updates to aa buy, functionalish

* Syntax / Formatting

* Add break / default to switch

* updates

* completed v2

* Major revisions

Main function check moved to when items are swapped and out of when ever bonus are recalculated.

AA Toggle and data structure now more accurate to live.

* Update aa.cpp

* debug removed

* implemented SE_Buy_AA_Rank

Closer to live.

* Update aa.cpp

broadening AA toggle to be more general use.

* improved various checks

aa toggle is now broadly implemented to be usable with any passive effect.

Co-authored-by: Akkadius <akkadius1@gmail.com>

common/spdat.cpp

@@ -1236,6 +1236,7 @@ bool IsEffectIgnoredInStacking(int spa)
 	case SE_Ff_CasterClass:
 	case SE_Ff_Same_Caster: 
 	case SE_Proc_Timer_Modifier:
+	case SE_Weapon_Stance:
 	case SE_TwinCastBlocker:
 	case SE_Fc_CastTimeAmt:
 	case SE_Fc_CastTimeMod2: