Immobile shuttles will not appear launchable on flight control consoles. (#91275)

## About The Pull Request

Custom shuttles introduced a weird edge case in shuttle code where the
flight control console shows the shuttle as able to be launched, despite
a lack of engines making it unable to move. This fixes that edge case by
specifically showing the shuttle as immobile in the console.

## Why It's Good For The Game

I tried to launch a custom shuttle but I couldn't figure out why it
wasn't moving. This fix at least lets players know that it won't launch
when it can't.

## Changelog

🆑
fix: Shuttle flight control computers will show you when the linked
shuttle cannot move.
/🆑

code/modules/shuttle/mobile_port/mobile_port.dm

@@ -295,6 +295,9 @@
 	if(mode == SHUTTLE_IGNITING && destination == destination_port)
 		return
 
+	if(!canMove())
+		return
+
 	switch(mode)
 		if(SHUTTLE_CALL)
 			if(destination_port == destination)

code/modules/shuttle/shuttle_consoles/shuttle_console.dm

@@ -99,6 +99,9 @@
 	if(!length(data["locations"]))
 		data["locked"] = TRUE
 		data["status"] = "Locked"
+	if(!mobile_docking_port.canMove())
+		data["locked"] = TRUE
+		data["status"] = "Immobile"
 	return data
 
 /**