RevScriptSys Monster enhanced attack conditions

[soul4soul]

Pull Request Prelude

• I have followed proper The Forgotten Server code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Issues addressed:

• Fix Revscriptsys Monster #3485
• Refactor parsing revscriptsys monster attack and defense to use a common helper function
• Allow conditions to be used with all predefine creature abilities. Conditions can be used with "melee", "combat", "speed", "condition", "outfit", "invisible", "*field", etc.. Conditions won't work with named spells such as "energy strike".

I verified conditions worked using these attack types.

monster.attacks = {
	{name = "melee", attack = 10, skill = 100, condition = { type = CONDITION_FIRE, minDamage = 50, maxDamage = 200, duration = 5000, interval = 1000}},
        {name = "condition", chance = 1000, range = 1, condition = { type = CONDITION_ENERGY, minDamage = 10, maxDamage = 20, duration = 5000, interval = 1000}},
        {name = "combat", type = COMBAT_LIFEDRAIN, chance = 100, interval = 2*1000, minDamage = 0, maxDamage = -10, target = true, range = 7, condition = { type = CONDITION_CURSED, minDamage = 10, maxDamage = 20, duration = 5000, interval = 1000}},
        {name = "speed", chance = 100, interval = 2000, speed = -500, target = true, range = 7, condition = { type = CONDITION_DROWN, minDamage = 20, maxDamage = 20, duration = 5000, interval = 1000}},
        {name = "firefield", chance = 100, interval = 2000, target = true, range = 7, condition = { type = CONDITION_FREEZING, minDamage = 20, maxDamage = 50, duration = 5000, interval = 1000}}
}