Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback
anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md).
All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Theriapolis.Core/Data/CladeDef.cs

@@ -0,0 +1,39 @@
+using System.Text.Json.Serialization;
+
+namespace Theriapolis.Core.Data;
+
+/// <summary>
+/// Immutable clade (race-equivalent) record loaded from clades.json.
+/// Defines the broad biological family — Canidae, Felidae, etc. —
+/// plus the ability mods, traits, and detriments shared by all member
+/// species. See clades.md for the authoritative content.
+/// </summary>
+public sealed record CladeDef
+{
+    [JsonPropertyName("id")]
+    public string Id { get; init; } = "";
+
+    [JsonPropertyName("name")]
+    public string Name { get; init; } = "";
+
+    /// <summary>STR/DEX/CON/INT/WIS/CHA → modifier (typically +1 each on two abilities).</summary>
+    [JsonPropertyName("ability_mods")]
+    public Dictionary<string, int> AbilityMods { get; init; } = new();
+
+    [JsonPropertyName("traits")]
+    public TraitDef[] Traits { get; init; } = Array.Empty<TraitDef>();
+
+    [JsonPropertyName("detriments")]
+    public TraitDef[] Detriments { get; init; } = Array.Empty<TraitDef>();
+
+    [JsonPropertyName("languages")]
+    public string[] Languages { get; init; } = Array.Empty<string>();
+
+    /// <summary>
+    /// "Predator" / "Prey" — surfaces in dialogue + faction-affinity logic
+    /// (Phase 6) and gates a few class features in Phase 5 (e.g. Feral
+    /// level-20 Apex Predator vs Apex Prey).
+    /// </summary>
+    [JsonPropertyName("kind")]
+    public string Kind { get; init; } = "predator";
+}