Cleanup and small update to the stethoscope! (#36210)

* First commit

* Address most of the review!

Content.Shared/Medical/Stethoscope/Components/StethoscopeComponent.cs

@@ -0,0 +1,31 @@
+using Content.Shared.FixedPoint;
+using Robust.Shared.GameStates;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.Medical.Stethoscope.Components;
+
+/// <summary>
+///     Adds a verb and action that allows the user to listen to the entity's breathing.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed partial class StethoscopeComponent : Component
+{
+    /// <summary>
+    ///     Time between each use of the stethoscope.
+    /// </summary>
+    [DataField]
+    public TimeSpan Delay = TimeSpan.FromSeconds(1.75);
+
+    /// <summary>
+    ///     Last damage that was measured. Used to indicate if breathing is improving or getting worse.
+    /// </summary>
+    [DataField]
+    public FixedPoint2? LastMeasuredDamage;
+
+    [DataField]
+    public EntProtoId Action = "ActionStethoscope";
+
+    [DataField]
+    public EntityUid? ActionEntity;
+}
+