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/Components/AdminMinigunComponent.cs

@@ -0,0 +1,7 @@
+namespace Content.Server.Administration.Components;
+
+[RegisterComponent]
+public sealed partial class AdminMinigunComponent : Component
+{
+
+}