Create Lightning Nova Variant of Nova

[CollinHerber]

Summary

When the Lightning Nova Passive is allocated on the Nova Tree the Nova Skill should be turned into Lightning Nova Skill

The lightning nova skill will have a much larger roll range of damage. It should take the minimum damage and half it. It should take the maximum damage and double it.

So if the damage roll range was 10-20 it should become 5-40

It should also apply a "Shock" Debuff for 5 Seconds that increases all damage taken by 10%

The lightning nova should also visually change both the icon in the Hotbar and the visual effect when using the skill itself to signify the skill has been modified.

Reasonings

To add in variety and more depth to the skill system

[GabeHasWon]

There is no damage range here. The Nova does player.HeldItem.damage * (2 + 0.5f * Level) damage; so for a level 1 nova, on a weapon with 20 base damage, it'll do between around 42-48 damage. I can make a range if you want, but the damage randomization is entirely on vanilla's end.

[GabeHasWon]

Added the range. At the moment, it's WAY more likely to roll >1 multiplier, but I'll fix that momentarily.

[pilchardheck]