Add events for GunComponent values, muzzle flashes and cartridge spread (#24077)

* Add a modifier event for GunComponent values

* Add docs

* Add VV readwrite to modified values

* Add more docs

* More docs

* Add Gun parameter to GunRefreshModifiersEvent

* Add another event for handling cartridge spread

* Fix pneumatic speed

Content.Server/Administration/Systems/AdminGunSystem.cs

@@ -0,0 +1,17 @@
+using Content.Server.Administration.Components;
+using Content.Shared.Weapons.Ranged.Events;
+
+namespace Content.Server.Administration.Systems;
+
+public sealed class AdminGunSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        SubscribeLocalEvent<AdminMinigunComponent, GunRefreshModifiersEvent>(OnGunRefreshModifiers);
+    }
+
+    private void OnGunRefreshModifiers(Entity<AdminMinigunComponent> ent, ref GunRefreshModifiersEvent args)
+    {
+        args.FireRate = 15;
+    }
+}