Adds Balloon Alerts to Smartgunners (#5866)

# About the pull request
Adds balloon alert texts to:
* swapping round type
* attempting to fire with insufficient skills
* attempting to fire with no harness
* attempting to fire with cover opened
* attempting to fire with no power

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# Explain why it's good for the game
I wanted to have more balloon alerts.
QoL for SGs to know why they can't fire without reading chat.
# Testing Photographs and Procedure
<details>
<summary>Pictures here</summary>
ignore the dot, fixed.


![image](https://github.com/cmss13-devs/cmss13/assets/54422837/8151cada-b3e3-4c64-ad76-1259408e7b8b)

![image](https://github.com/cmss13-devs/cmss13/assets/54422837/166af4b5-6e50-4f68-a8a9-724c5f6dc6ad)


![image](https://github.com/cmss13-devs/cmss13/assets/54422837/190aadab-81ce-468c-82ca-5c06095186e3)

![image](https://github.com/cmss13-devs/cmss13/assets/54422837/a9d8e70a-7f64-4a8f-bfe9-6bdd3874fb90)

![image](https://github.com/cmss13-devs/cmss13/assets/54422837/d0b75fe4-7ea7-44f4-90c2-431fbccec4ef)


</details>


# Changelog
:cl:
qol: Added balloon alerts to smartgunners
/:cl:

code/modules/projectiles/guns/smartgun.dm

@@ -316,14 +316,15 @@
 			return FALSE
 		var/mob/living/carbon/human/H = user
 		if(!skillcheckexplicit(user, SKILL_SPEC_WEAPONS, SKILL_SPEC_SMARTGUN) && !skillcheckexplicit(user, SKILL_SPEC_WEAPONS, SKILL_SPEC_ALL))
-			to_chat(H, SPAN_WARNING("You don't seem to know how to use \the [src]..."))
+			balloon_alert(user, "insufficient skills")
 			return FALSE
 		if(requires_harness)
 			if(!H.wear_suit || !(H.wear_suit.flags_inventory & SMARTGUN_HARNESS))
-				to_chat(H, SPAN_WARNING("You need a harness suit to be able to fire [src]..."))
+				balloon_alert(user, "harness required")
 				return FALSE
 		if(cover_open)
 			to_chat(H, SPAN_WARNING("You can't fire \the [src] with the feed cover open! (alt-click to close)"))
+			balloon_alert(user, "cannot fire; feed cover open")
 			return FALSE
 
 /obj/item/weapon/gun/smartgun/unique_action(mob/user)
@@ -337,6 +338,7 @@
 		return
 	secondary_toggled = !secondary_toggled
 	to_chat(user, "[icon2html(src, usr)] You changed \the [src]'s ammo preparation procedures. You now fire [secondary_toggled ? "armor shredding rounds" : "highly precise rounds"].")
+	balloon_alert(user, "firing [secondary_toggled ? "armor shredding" : "highly precise"]")
 	playsound(loc,'sound/machines/click.ogg', 25, 1)
 	ammo = secondary_toggled ? ammo_secondary : ammo_primary
 	var/datum/action/item_action/smartgun/toggle_ammo_type/TAT = locate(/datum/action/item_action/smartgun/toggle_ammo_type) in actions
@@ -387,7 +389,7 @@
 			return FALSE
 		return TRUE
 	if(!battery || battery.power_cell.charge == 0)
-		to_chat(usr, SPAN_WARNING("[src] emits a low power warning and immediately shuts down!"))
+		balloon_alert(usr, "low power")
 		return FALSE
 	return FALSE