Umbrellas for Rimpoint | A funny name for a funny PR (#4682)

## About The Pull Request
Working Umbrellas, printed with Plastic and Iron, at autolathes. 
## Why It's Good For The Game

I'm unsure as to why we didn't have these to begin with for species that
can't stand in rain such as slimes.
## Proof Of Testing
<details>
<summary>Screenshots/Videos</summary>




https://github.com/user-attachments/assets/e9702747-0092-4d86-bf91-6c3429c656fc



</details>

## Changelog
🆑
add: Added umbrellas for Rimpoint at Autolathes and Service Protolathes
which block rain reagants.
/🆑

---------

Co-authored-by: Cursor <102828457+theselfish@users.noreply.github.com>

code/controllers/subsystem/weather.dm

@@ -119,7 +119,7 @@ SUBSYSTEM_DEF(weather)
 	var/datum/weather/A
 	for(var/V in processing)
 		var/datum/weather/W = V
-		if((z in W.impacted_z_levels) && W.area_type == active_area.type)
+		if((z in W.impacted_z_levels) &&  istype(active_area, W.area_type)) // BUBBER EDIT: This proc was broken, fixed to now use istype.
 			A = W
 			break
 	return A