Gunify pneumatic cannon (#13296)

Content.Shared/Weapons/Ranged/Components/ContainerAmmoProviderComponent.cs

@@ -0,0 +1,13 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Weapons.Ranged.Components;
+
+/// <summary>
+///     Handles pulling entities from the given container to use as ammunition.
+/// </summary>
+[RegisterComponent]
+public sealed class ContainerAmmoProviderComponent : AmmoProviderComponent
+{
+    [DataField("container", required: true)]
+    public string Container = default!;
+}