Expeditions rework (#18960)

Content.Shared/Salvage/Expeditions/SalvageMobEntry.cs

@@ -0,0 +1,24 @@
+using Content.Shared.Random;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Shared.Salvage.Expeditions;
+
+[DataDefinition]
+public partial record struct SalvageMobEntry() : IBudgetEntry
+{
+    /// <summary>
+    /// Cost for this mob in a budget.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), DataField("cost")]
+    public float Cost { get; set; } = 1f;
+
+    /// <summary>
+    /// Probability to spawn this mob. Summed with everything else for the faction.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), DataField("prob")]
+    public float Prob { get; set; } = 1f;
+
+    [ViewVariables(VVAccess.ReadWrite), DataField("proto", required: true, customTypeSerializer:typeof(PrototypeIdSerializer<EntityPrototype>))]
+    public string Proto { get; set; } = string.Empty;
+}