Disablers can no longer execute people (#6696)

# About the pull request

Disablers can't execute people anymore.

# Explain why it's good for the game

This doesn't really make sense to be in the game, I've never seen anyone
intentionally try to execute with a disabler before, it's always some
poor newbie MP who does it by accident and gets PTSD afterwards.


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
del: Disablers can't execute people anymore
/:cl:

code/__DEFINES/conflict.dm

@@ -54,24 +54,25 @@
 #define GUN_TRIGGER_SAFETY (1<<1)
 #define GUN_UNUSUAL_DESIGN (1<<2)
 #define GUN_SILENCED (1<<3)
+#define GUN_CANT_EXECUTE (1<<4)
 ///If checking for ammo with current.mag you have to check it against numerical values, as booleans will not trigger.
-#define GUN_INTERNAL_MAG (1<<4)
-#define GUN_AUTO_EJECTOR (1<<5)
-#define GUN_AMMO_COUNTER (1<<6)
-#define GUN_BURST_FIRING (1<<7)
-#define GUN_FLASHLIGHT_ON (1<<8)
-#define GUN_WY_RESTRICTED (1<<9)
-#define GUN_SPECIALIST (1<<10)
-#define GUN_WIELDED_FIRING_ONLY (1<<11)
+#define GUN_INTERNAL_MAG (1<<5)
+#define GUN_AUTO_EJECTOR (1<<6)
+#define GUN_AMMO_COUNTER (1<<7)
+#define GUN_BURST_FIRING (1<<8)
+#define GUN_FLASHLIGHT_ON (1<<9)
+#define GUN_WY_RESTRICTED (1<<10)
+#define GUN_SPECIALIST (1<<11)
+#define GUN_WIELDED_FIRING_ONLY (1<<12)
 /// removes unwielded accuracy and scatter penalties (not recoil)
-#define GUN_ONE_HAND_WIELDED (1<<12)
-#define GUN_ANTIQUE (1<<13)
+#define GUN_ONE_HAND_WIELDED (1<<13)
+#define GUN_ANTIQUE (1<<14)
 /// Whether the gun has been fired by its current user (reset upon `dropped()`)
-#define GUN_RECOIL_BUILDUP (1<<14)
+#define GUN_RECOIL_BUILDUP (1<<15)
 /// support weapon, bipod will grant autofire
-#define GUN_SUPPORT_PLATFORM (1<<15)
+#define GUN_SUPPORT_PLATFORM (1<<16)
 /// No gun description, only base desc
-#define GUN_NO_DESCRIPTION (1<<16)
+#define GUN_NO_DESCRIPTION (1<<17)
 // NOTE: Don't add flags past 1<<23, it'll break things due to BYOND limitations. You can usually use a Component instead.
 
 #define USES_STREAKS (1<<0)

code/_globalvars/bitfields.dm

@@ -108,6 +108,7 @@ DEFINE_BITFIELD(flags_gun_features, list(
 	"GUN_TRIGGER_SAFETY" = GUN_TRIGGER_SAFETY,
 	"GUN_UNUSUAL_DESIGN" = GUN_UNUSUAL_DESIGN,
 	"GUN_SILENCED" = GUN_SILENCED,
+	"GUN_CANT_EXECUTE" = GUN_CANT_EXECUTE,
 	"GUN_INTERNAL_MAG" = GUN_INTERNAL_MAG,
 	"GUN_AUTO_EJECTOR" = GUN_AUTO_EJECTOR,
 	"GUN_AMMO_COUNTER" = GUN_AMMO_COUNTER,

code/modules/projectiles/gun.dm

@@ -1340,6 +1340,8 @@ and you're good to go.
 	if(EXECUTION_CHECK) //Execution
 		if(!able_to_fire(user)) //Can they actually use guns in the first place?
 			return ..()
+		if(flags_gun_features & GUN_CANT_EXECUTE)
+			return ..()
 		user.visible_message(SPAN_DANGER("[user] puts [src] up to [attacked_mob], steadying their aim."), SPAN_WARNING("You put [src] up to [attacked_mob], steadying your aim."),null, null, CHAT_TYPE_COMBAT_ACTION)
 		if(!do_after(user, 3 SECONDS, INTERRUPT_ALL|INTERRUPT_DIFF_INTENT, BUSY_ICON_HOSTILE))
 			return TRUE

code/modules/projectiles/guns/energy.dm

@@ -214,6 +214,7 @@
 	charge_icon = "+taser"
 	black_market_value = 20
 	actions_types = list(/datum/action/item_action/taser/change_mode)
+	flags_gun_features = GUN_UNUSUAL_DESIGN|GUN_CAN_POINTBLANK|GUN_CANT_EXECUTE
 	/// Determines if the taser will hit any target, or if it checks for wanted status. Default is wanted only.
 	var/mode = TASER_MODE_P
 	var/skilllock = SKILL_POLICE_SKILLED