Clean Endstone

🚀 Added

• Smooth Endstone: Completely redesigned the base Endstone texture to remove the harsh, noisy vanilla pattern.
• Polished Variants: Tweaked End Stone Bricks and blocks to align with the new, seamless aesthetic.

🔧 Tweaks & Fixes

• Texture Tiling: Optimized edges so large walls and terrain generation render perfectly without visible seams.
• Performance: Cleaned up asset files to ensure zero impact on FPS.