Stats: stat sheets, formulas, archetypes, traits, stat pools, actions, conditions and sheet panel

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/State/StatStateData.cs

@@ -0,0 +1,12 @@
+namespace Cthangover.Mods.Stats
+{
+    using System;
+    using System.Collections.Generic;
+
+    /// <summary>The saved stats of a game: per character id (the stats slot's one blob).</summary>
+    public class StatStateData
+    {
+        /// <summary>Character id → what it gained during play.</summary>
+        public Dictionary<string, CharacterStatState> Characters { get; set; } = new(StringComparer.OrdinalIgnoreCase);
+    }
+}