Cast bar with effects for classic wotlk [Zashoo]

This is a port from the same Weakarua for retail, with some changes
Retail version: https://wago.io/1Lmw3qHeD
This is a custom cast bar with theme fitting special effects for every class, and some specs.

It's a little tricky to make spec specific for classic because there are no official specs, just talents to spend.
I made it so if you go down the mage fire tree for example you will get the fire specific cast bar once you spec into "Critical mass". You most likely will select that talent if you are fire.