Petrichor: Rain & Storms

Changed

• With a shader pack, puddles are now marked as puddles, not just as water, so a pack that supports it can tell them apart from real water (for example to draw rain rings only on puddles instead of guessing from the shape of the ground, which sometimes took part of a waterfall for a puddle). Other packs keep drawing puddles as their water. For pack authors: puddle vertices carry mc_Entity.y == 2 and the pack's water id in mc_Entity.x.
• Rain rings on water are drawn in the game's pixels: each ring is one texture pixel wide and grows a pixel at a time from the pixel the drop hit, like an animated sprite, instead of a smooth ring that stood out among the textures.