feat(studio): port character skills tab

src/AcDream.App/UI/Layout/CharacterSheet.cs

@@ -122,6 +122,12 @@ public sealed class CharacterSheet
     /// </summary>
     public long[] AttributeRaiseCosts { get; init; } = Array.Empty<long>();
 
+    /// <summary>
+    /// Skills shown on the Character window Skills tab. Retail gmSkillUI groups these by
+    /// advancement class, then sorts each group alphabetically by skill name.
+    /// </summary>
+    public IReadOnlyList<CharacterSkill> Skills { get; init; } = Array.Empty<CharacterSkill>();
+
     // ── Augmentations  (UpdateAugmentations 0x004b9000) ─────────────────────
     // Retail InqInt(0x162) = AugmentationStat; string-switch 1..0xb.
 
@@ -135,3 +141,24 @@ public sealed class CharacterSheet
     public int BurdenCurrent { get; init; }
     public int BurdenMax     { get; init; }
 }
+
+public enum CharacterSkillAdvancementClass
+{
+    Inactive = 0,
+    Untrained = 1,
+    Trained = 2,
+    Specialized = 3,
+}
+
+public sealed record CharacterSkill(
+    uint Id,
+    string Name,
+    uint IconDid,
+    CharacterSkillAdvancementClass AdvancementClass,
+    int BaseLevel,
+    int CurrentLevel,
+    bool UsableUntrained,
+    int TrainedCost,
+    int SpecializedCost,
+    long RaiseCost,
+    long Raise10Cost = 0L);