- Added Last Judgement support (for now Isaac's default sprite will be used, other are WIP) and fixing sprites overrides
- Refactored code for spawning Isaac's corpse for ghost characters
- Refactored and unified filenames for angelic baby resprites

I've rewrited whole code from scratch to make it more maintable

Also can confirm through testing that it's working on both Rep and Rep+

Add Mod Config Menu options to new functions:
- Change variant for Apollyon, Azazel, Judas and Lazarus
- Enable / Disable special Angelic Baby sprites for Cain, Lilith and Jacob
Added more descriptive description

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