add syndicate singularity beacon (#18486)

* implement singulo attraction

* add attractor syndie item

* cleanup

* fix name/desc

* actually fix name

* singulo toolbox no longer whitelisted

* add custom sprite, overhaul prototype

* address review

* beacon real

* webedit 1

* webedit 2

* webedit 3

* permalink to copyright

---------

Co-authored-by: deltanedas <39013340+deltanedas@users.noreply.github.com>

Content.Server/Singularity/Components/SingularityAttractorComponent.cs

@@ -0,0 +1,30 @@
+using Content.Server.Singularity.EntitySystems;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+
+namespace Content.Server.Singularity.Components;
+
+/// <summary>
+/// Attracts the singularity.
+/// </summary>
+[RegisterComponent]
+[Access(typeof(SingularityAttractorSystem))]
+public sealed partial class SingularityAttractorComponent : Component
+{
+    /// <summary>
+    /// The range at which singularities will be unable to go away from the attractor.
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadWrite)]
+    public float BaseRange = 25f;
+
+    /// <summary>
+    /// The amount of time that should elapse between pulses of this attractor.
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadOnly)]
+    public TimeSpan TargetPulsePeriod = TimeSpan.FromSeconds(2);
+
+    /// <summary>
+    /// The last time this attractor pulsed.
+    /// </summary>
+    [DataField(customTypeSerializer: typeof(TimeOffsetSerializer))]
+    public TimeSpan LastPulseTime = default!;
+}