Battlers [DONE!] Custom Egg sprites for all species up to gen 8 1.2

All of the icons were added, including some missing ones like evolutions of baby Pokémon that can be hatched like Wobbuffet and Mr. Mime. I might add some modified new sprites from time to time, but for now this should be completed, so feel free to use it without any worries!

I'm starting to sprite all the icons corresponding to the ones from the Reborn team alphabetically,for now those Species whose name start with A or B have been added. A new folder has been added so you can choose if you want to include them or not.

I also reluctantly corrected the mentioned mistakes, gotta say the flipped Taillow was kind of cute