fix materials for wind and add new snow system

core/daynight/weather_plain_shader.gdshader

@@ -7,16 +7,13 @@ global uniform float global_snow_accumulation_speed;
 global uniform float global_snow_melt_time;
 global uniform float global_snow_melt_speed;
 global uniform vec4  global_snow_color;
-
-// Rain globals
-global uniform float global_rain_intensity;
-global uniform float global_rain_puddle_amount;
-
-// Snow parameters
 uniform float snow_edge_softness : hint_range(0.01, 0.5) = 0.15;
 uniform float snow_color_variation : hint_range(0.0, 0.15) = 0.05;
 
+
 // Rain wetness parameters
+global uniform float global_rain_intensity;
+global uniform float global_rain_puddle_amount;
 uniform float ripple_scale : hint_range(0.1, 5.0) = 1.5;
 uniform float ripple_speed : hint_range(0.5, 5.0) = 2.0;
 uniform float ripple_layers : hint_range(1.0, 4.0) = 3.0;