[Spells] Updates to spell field 'cast not stands' to ignore casting restrictions (#1938)

* test

* complete

* Update effects.cpp

* Update spells.cpp

* Update effects.cpp

* [Spells] Support for bards using Disciplines while casting or /melody.

Support for spell field 'cast not standing' not allow casting from divine aura

* [Spells] Support for bards using Disciplines while casting or /melody.

DA bypass logic for spells with field 'cast_not_standing'

* updates

* stun and mez bypass

* Update spdat.cpp

* Update spdat.cpp

* Update spells.cpp

common/spdat.cpp

@@ -1671,3 +1671,15 @@ bool CastRestrictedSpell(int spellid)
 			return false;
 	}
 }
+
+bool IgnoreCastingRestriction(int32 spell_id) {
+	/*
+		field 'cast_not_standing' allows casting when sitting, stunned, mezed, Divine Aura, through SPA 343 Interrupt casting
+		Likely also allows for casting while feared, but need to confirm. Possibly also while charmed.
+		This field also allows for damage to ignore DA immunity.
+	*/
+	if (spells[spell_id].cast_not_standing) {
+		return true;
+	}
+	return false;
+}

common/spdat.h

@@ -1357,7 +1357,7 @@ struct SPDat_Spell_Struct
 /* 181 */	int pvp_duration; // buffdurationformula for PvP -- PVP_DURATION
 /* 182 */	int pvp_duration_cap; // buffduration for PvP -- PVP_DURATION_CAP
 /* 183 */	int pcnpc_only_flag; // valid values are 0, 1 = PCs (and mercs), and 2 = NPCs (and not mercs) -- PCNPC_ONLY_FLAG
-/* 184 */	bool cast_not_standing; // this is checked in the client's EQ_Spell::IsCastWhileInvisSpell, this also blocks SE_InterruptCasting from affecting this spell -- CAST_NOT_STANDING
+/* 184 */	bool cast_not_standing; // this is checked in the client's EQ_Spell::IsCastWhileInvisSpell, this also blocks SE_InterruptCasting from affecting this spell -- CAST_NOT_STANDING (Allows casting if DA, stun, mezed, charm? fear?, damage to invul targets)
 /* 185 */	bool can_mgb; // 0=no, -1 or 1 = yes -- CAN_MGB
 /* 186 */	int dispel_flag; // -- NO_DISPELL
 /* 187 */	//int npc_category; // -- NPC_MEM_CATEGORY
@@ -1537,6 +1537,7 @@ int GetViralMaxSpreadTime(int32 spell_id);
 int GetViralSpreadRange(int32 spell_id);
 bool IsInstrumentModAppliedToSpellEffect(int32 spell_id, int effect);
 uint32 GetProcLimitTimer(int32 spell_id, int proc_type);
+bool IgnoreCastingRestriction(int32 spell_id);
 
 int CalcPetHp(int levelb, int classb, int STA = 75);
 int GetSpellEffectDescNum(uint16 spell_id);