Add emp grenade (#14393)

Content.Server/Emp/EmpOnTriggerComponent.cs

@@ -0,0 +1,17 @@
+namespace Content.Server.Emp;
+
+/// <summary>
+/// Upon being triggered will EMP area around it.
+/// </summary>
+[RegisterComponent]
+sealed class EmpOnTriggerComponent : Component
+{
+    [DataField("range"), ViewVariables(VVAccess.ReadWrite)]
+    public float Range = 1.0f;
+
+    /// <summary>
+    /// How much energy will be consumed per battery in range
+    /// </summary>
+    [DataField("energyConsumption"), ViewVariables(VVAccess.ReadWrite)]
+    public float EnergyConsumption;
+}