Implements item pricing, and piracy. (#8548)

* Start implementing item pricing.

* Flesh out prices a bit, add the appraisal tool.

* Add prices to more things.

* YARRRRRRR

* gives pirates an appraisal tool in their pocket.

* Makes the various traitor objectives valuable. Also nerfs the price of a living person, so it's easier to bargain for them.

* Address reviews.

* Address reviews.

Content.Server/Cargo/Components/MobPriceComponent.cs

@@ -0,0 +1,26 @@
+namespace Content.Server.Cargo.Components;
+
+/// <summary>
+/// This is used for calculating the price of mobs.
+/// </summary>
+[RegisterComponent]
+public sealed class MobPriceComponent : Component
+{
+    /// <summary>
+    /// How much of a penalty per part there should be. This is a multiplier for a multiplier, the penalty for each body part is calculated from the total number of slots, and then multiplied by this.
+    /// </summary>
+    [DataField("missingBodyPartPenalty")]
+    public double MissingBodyPartPenalty = 1.0f;
+
+    /// <summary>
+    /// The base price this mob should fetch.
+    /// </summary>
+    [DataField("price", required: true)]
+    public double Price;
+
+    /// <summary>
+    /// The percentage of the actual price that should be granted should the appraised mob be dead.
+    /// </summary>
+    [DataField("deathPenalty")]
+    public double DeathPenalty = 0.2f;
+}