examine signature changed to include distance

- distance is INFINITE, 0, or a positive integer based on get_dist() between
the examiner and examinee's turfs when they are on the same Z. When the
examiner is dead or a ghost, distance is always 0.
- also updates /examine( implementations to use it!
- adds w_class_to_name proc for reusing "It is a X item." examine behavior.

code/modules/hydroponics/beekeeping/beehive.dm

@@ -30,7 +30,7 @@
 			if(81 to 100)
 				add_overlay("bees3")
 
-/obj/machinery/beehive/examine(var/mob/user)
+/obj/machinery/beehive/examine(mob/user, distance, infix, suffix)
 	. = ..()
 	if(!closed)
 		. += "The lid is open."

code/modules/hydroponics/grown_sif.dm

@@ -5,7 +5,7 @@
 	. = ..()
 	seeds = rand(1, 2)
 
-/obj/item/reagent_containers/food/snacks/grown/sif/examine(mob/user)
+/obj/item/reagent_containers/food/snacks/grown/sif/examine(mob/user, distance, infix, suffix)
 	. = ..()
 	if(seeds)
 		. += SPAN_NOTICE("You can see [seeds] seed\s in \the [src]. You might be able to extract them with a sharp object.")

code/modules/hydroponics/seed_packets.dm

@@ -61,7 +61,7 @@ GLOBAL_LIST_BOILERPLATE(all_seed_packs, /obj/item/seeds)
 		src.name = "sample of [seed.seed_name] [seed.seed_noun]"
 		src.desc = "It's labelled as coming from [seed.display_name]."
 
-/obj/item/seeds/examine(mob/user)
+/obj/item/seeds/examine(mob/user, distance, infix, suffix)
 	. = ..()
 	if(seed && !seed.roundstart)
 		. += "It's tagged as variety #[seed.uid]."

code/modules/hydroponics/trays/tray.dm

@@ -635,7 +635,7 @@
 	else if(dead)
 		remove_dead(user)
 
-/obj/machinery/portable_atmospherics/hydroponics/examine(mob/user)
+/obj/machinery/portable_atmospherics/hydroponics/examine(mob/user, distance, infix, suffix)
 	. = ..()
 
 	if(seed)
@@ -643,8 +643,8 @@
 	else
 		. += "It is empty."
 
-	if(!Adjacent(user))
-		return .
+	if(distance > 2)
+		return
 
 	. += "Water: [round(waterlevel,0.1)]/100"
 	. += "Nutrient: [round(nutrilevel,0.1)]/10"