Upgrades and animations

UPDATE LOG v0.1

• > WEAPON PROGRESSION:
  Implemented a 3-tier upgrade path for some of the weapons (Base → Upgraded → Final).
• > ELEMENTAL SYSTEM:
  Added socketed variants for the first 4 weapons.
• > NEW VISUALS:
  Unique animated sprites for BLUE, YELLOW, GREEN, and RED gem upgrades.
• > ANIMATION:
  Full animation support with distinct frames for each color.