Weather with World Logic (#9621)

* Weather sense

Honestly, doesn't seem game changing enough to warrant privileged restriction.

* Weather set

* Rename "snow" to "snowing"

Fix conflict with the snow floor block, though I don't know if this'll have negative repercussions on saves.

* Don't last forever

* Cleanup and bundle

* add space

core/src/mindustry/logic/GlobalVars.java

@@ -125,6 +125,10 @@ public class GlobalVars{
             put("@" + type.name, type);
         }
 
+        for(Weather weather : Vars.content.weathers()){
+            put("@" + weather.name, weather);
+        }
+
         //store sensor constants
         for(LAccess sensor : LAccess.all){
             put("@" + sensor.name(), sensor);