(Real) First Beta Release

Initial Beta Release!
Added the Upgrade system
- Removed all attribute-upgrading enchantments (Sharpness, Efficiency, etc.)
- Added Smithing Stones, items which can be used to upgrade items when combined with specific stone types
- Completely data-driven, using the same effect system as enchantments
Removed the anvil repair cost penalty after repairing items
Removed the Mending enchantment altogether
Replaced Chests in ancient cities with Strongboxes, which take longer to open and break than regular chests
Added new tooltips for enchantments / armor trims