Iron's Spells 'n Spellbooks

v1.20.1-1.2.1 8/10/23

### Additions
- Added the Decrepit Flamberge sword
- Added error message to the Wayward Compass if there is no found structure

### Changes
- Slimmed down Electromancer Chestplate Model
- Slimmed down Priest Chestplate Model
- Slimmed down Archevoker Chestplate Model
- Removed Black Pixel from Archevoker Shoulderpad
- Updated Archevoker, Pyromancer, Electromancer, and Scarecrow Hat icons
- Updated Archevoker and Electromancer Chestplate icons to better match their models
- Slightly Tweaked Pyromancer Hat model
- Updated Plagued Helmet and Chestplate icons
- Overhauled Ancient Knight animations
- Overhauled Ancient Knight sounds
- Overhauled Ancient Knight energy layer
- Ancient Knights now carry Decrepit Flamberges
- Magehunter sword reworked
- Tweaked Chain Lightning and Healing Circle spell icons

### Fixes
- Fixed Black Holes of small enough radius causing a divide by zero crash