Created Proximity Detection and Beeper Systems (#23177)

Content.Shared/ProximityDetection/Components/ProximityDetectorComponent.cs

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+using Content.Shared.FixedPoint;
+using Content.Shared.ProximityDetection.Systems;
+using Content.Shared.Whitelist;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.ProximityDetection.Components;
+/// <summary>
+/// This is used to search for the closest entity with a range that matches specified requirements (tags and/or components)
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState ,Access(typeof(ProximityDetectionSystem))]
+public sealed partial class ProximityDetectorComponent : Component
+{
+    /// <summary>
+    /// Whether or not it's on.
+    /// </summary>
+    [DataField("enabled"), AutoNetworkedField, ViewVariables(VVAccess.ReadWrite)]
+    public bool Enabled = true;
+
+    [DataField("criteria", required: true), AutoNetworkedField, ViewVariables(VVAccess.ReadWrite)]
+    public EntityWhitelist Criteria = default!;
+
+    /// <summary>
+    /// Found Entity
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), AutoNetworkedField]
+    public EntityUid? TargetEnt;
+
+    /// <summary>
+    /// Distance to Found Entity
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), AutoNetworkedField]
+    public FixedPoint2 Distance = -1;
+
+
+    /// <summary>
+    /// The farthest distance to search for targets
+    /// </summary>
+    [DataField("range"), ViewVariables(VVAccess.ReadWrite), AutoNetworkedField]
+    public FixedPoint2 Range = 10f;
+
+    public float AccumulatedFrameTime;
+
+    [DataField("updateRate"), ViewVariables(VVAccess.ReadWrite), AutoNetworkedField]
+    public float UpdateRate = 0.3f;
+}