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/Rules/Combat/AttackOption.cs

@@ -0,0 +1,27 @@
+using Theriapolis.Core.Rules.Stats;
+
+namespace Theriapolis.Core.Rules.Combat;
+
+/// <summary>
+/// One attack a combatant can attempt — a weapon, a natural attack, or an
+/// NPC stat-block entry. Built once at combat-start; the resolver rolls
+/// against it. Distinct from <see cref="AttackProfile"/>, which is the
+/// per-attempt struct that bakes in attacker/defender/situation.
+/// </summary>
+public sealed record AttackOption
+{
+    public string     Name             { get; init; } = "";
+    /// <summary>Total +N to add to the d20 attack roll.</summary>
+    public int        ToHitBonus       { get; init; }
+    public DamageRoll Damage           { get; init; } = new(0, 0, 0, DamageType.Bludgeoning);
+    /// <summary>Reach in tactical tiles. 1 = 5 ft. melee; 2 = 10 ft. polearm or Large reach.</summary>
+    public int        ReachTiles       { get; init; } = 1;
+    /// <summary>Short-range tiles for ranged attacks (0 = melee-only).</summary>
+    public int        RangeShortTiles  { get; init; } = 0;
+    /// <summary>Long-range tiles (disadvantage past short, can't fire past long).</summary>
+    public int        RangeLongTiles   { get; init; } = 0;
+    /// <summary>Crit-range threshold (default 20; razored weapons crit on 19+).</summary>
+    public int        CritOnNatural    { get; init; } = 20;
+
+    public bool IsRanged => RangeShortTiles > 0;
+}