v1.6

Add CharacterFrame.lua to addon, refactoring slot upgrade text processing

Create new CharacterFrame.lua to handle equipment slot upgrade text generation
Implement comprehensive slot processing with debug logging
Move complex slot text creation logic from FullyUpgraded.lua to new file
Enhance text positioning and visibility handling
Bump version to 1.6 in TOC file
Update currency IDs for Carved, Runed, and Gilded crests