modules/atmospherics major cleanup (#61904)

major cleanup of modules/atmospherics folder and all related files, still many missing
-cleanup of procs name
-cleanup of vars name
-documentation of some of the procs
-minor changes to some for() logic (no in game changes just early continue or as anything checks)

No in game changes, only code and docs

code/modules/shuttle/on_move.dm

@@ -243,20 +243,20 @@ All ShuttleMove procs go here
 					break
 
 			if(!connected)
-				nullifyNode(i)
+				nullify_node(i)
 
 		if(!nodes[i])
 			missing_nodes = TRUE
 
 	if(missing_nodes)
-		atmosinit()
+		atmos_init()
 		for(var/obj/machinery/atmospherics/A in pipeline_expansion())
-			A.atmosinit()
-			if(A.returnPipenet())
-				A.addMember(src)
+			A.atmos_init()
+			if(A.return_pipenet())
+				A.add_member(src)
 		SSair.add_to_rebuild_queue(src)
 	else
-		// atmosinit() calls update_appearance(), so we don't need to call it
+		// atmos_init() calls update_appearance(), so we don't need to call it
 		update_appearance()
 
 /obj/machinery/navbeacon/beforeShuttleMove(turf/newT, rotation, move_mode, obj/docking_port/mobile/moving_dock)

code/modules/shuttle/shuttle_rotate.dm

@@ -80,13 +80,13 @@ If ever any of these procs are useful for non-shuttles, rename it to proc/rotate
 /************************************Machine rotate procs************************************/
 
 /obj/machinery/atmospherics/shuttleRotate(rotation, params)
-	var/list/real_node_connect = getNodeConnects()
+	var/list/real_node_connect = get_node_connects()
 	for(var/i in 1 to device_type)
 		real_node_connect[i] = angle2dir(rotation+dir2angle(real_node_connect[i]))
 
 	. = ..()
-	SetInitDirections()
-	var/list/supposed_node_connect = getNodeConnects()
+	set_init_directions()
+	var/list/supposed_node_connect = get_node_connects()
 	var/list/nodes_copy = nodes.Copy()
 
 	for(var/i in 1 to device_type)