Re-organize all projects (#4166)

Content.Server/Stunnable/Components/StunnableProjectileComponent.cs

@@ -0,0 +1,42 @@
+using Content.Server.Projectiles.Components;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Physics.Collision;
+using Robust.Shared.Physics.Dynamics;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Server.Stunnable.Components
+{
+    /// <summary>
+    /// Adds stun when it collides with an entity
+    /// </summary>
+    [RegisterComponent]
+    public sealed class StunnableProjectileComponent : Component, IStartCollide
+    {
+        public override string Name => "StunnableProjectile";
+
+        // See stunnable for what these do
+        [DataField("stunAmount")]
+        private int _stunAmount = default;
+        [DataField("knockdownAmount")]
+        private int _knockdownAmount = default;
+        [DataField("slowdownAmount")]
+        private int _slowdownAmount = default;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            Owner.EnsureComponentWarn(out ProjectileComponent _);
+        }
+
+        void IStartCollide.CollideWith(Fixture ourFixture, Fixture otherFixture, in Manifold manifold)
+        {
+            if (otherFixture.Body.Owner.TryGetComponent(out StunnableComponent? stunnableComponent))
+            {
+                stunnableComponent.Stun(_stunAmount);
+                stunnableComponent.Knockdown(_knockdownAmount);
+                stunnableComponent.Slowdown(_slowdownAmount);
+            }
+        }
+    }
+}