Stunnable New Status and Cleanup (#38618)

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>
Co-authored-by: pa.pecherskij <pa.pecherskij@interfax.ru>

Content.Shared/Movement/Components/MovementModStatusEffectComponent.cs

@@ -0,0 +1,25 @@
+using Content.Shared.Movement.Systems;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Movement.Components;
+
+/// <summary>
+/// This is used to store a movement speed modifier attached to a status effect entity so it can be applied via statuses.
+/// To be used in conjunction with <see cref="MovementModStatusSystem"/>.
+/// See <see cref="MovementModStatusComponent"/> for the component applied to the entity.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState, Access(typeof(MovementModStatusSystem))]
+public sealed partial class MovementModStatusEffectComponent : Component
+{
+    /// <summary>
+    /// Multiplicative sprint modifier, with bounds of [0, 1)
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float SprintSpeedModifier = 0.5f;
+
+    /// <summary>
+    /// Multiplicative walk modifier, with bounds of [0, 1)
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float WalkSpeedModifier = 0.5f;
+}