AbyssNebula shader

First public release (based on Sundial Lite 1.1.0).

• Colored lighting with per-block light colors and a soft glow
• Glowing blocks: creaking heart, redstone block, lapis block, froglights, sculk sensor, end portal frame, ender chest
• Glittering ores
• Night sky: crescent moon, nebula, Milky Way, twinkling stars
• Calmer water waves and clearer water