Arvani Textures

Full Changelog:

• Environment: Stonecutter.

• Utility: Anvil.

• Blocks: Observer, All Wools, Piston, Piston Sticky.

Minor Fixes:

• Fixed and refined textures: Prismarine Bricks.

Every texture has been reworked to better match lighting, improve readability, and enhance visual cohesion—especially during night cycles.