feat: add player-aware world interaction system

src/Features/Interactions/Contracts/IInteractionService.cs

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+namespace Game.Features.Interactions.Contracts;
+
+public interface IInteractionService
+{
+    InteractionResult TryInteract(InteractionRequest request);
+}

src/Features/Interactions/Contracts/IInteractionService.cs.uid

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+uid://a3n8v5r1q7m9c

src/Features/Interactions/Contracts/IInteractionTarget.cs

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+namespace Game.Features.Interactions.Contracts;
+
+public interface IInteractionTarget
+{
+    InteractionTargetId Id { get; }
+    bool CanInteract { get; }
+    InteractionPrompt Prompt { get; }
+}

src/Features/Interactions/Contracts/IInteractionTarget.cs.uid

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+uid://c7p2y5n8f1v6m

src/Features/Interactions/Contracts/IInteractionWorld.cs

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+namespace Game.Features.Interactions.Contracts;
+
+public interface IInteractionWorld
+{
+    InteractionResult TryInteract(InteractionRequest request);
+}

src/Features/Interactions/Contracts/IInteractionWorld.cs.uid

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+uid://d7k1x6m4v9q2b

src/Features/Interactions/Contracts/InteractionPrompt.cs

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+namespace Game.Features.Interactions.Contracts;
+
+public readonly record struct InteractionPrompt(string Text);

src/Features/Interactions/Contracts/InteractionPrompt.cs.uid

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+uid://b3m8r1x6d9w4k

src/Features/Interactions/Contracts/InteractionRequest.cs

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+using Game.Features.Players.Contracts;
+
+namespace Game.Features.Interactions.Contracts;
+
+public readonly record struct InteractionRequest(PlayerId PlayerId, InteractionTargetId TargetId);

src/Features/Interactions/Contracts/InteractionRequest.cs.uid

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+uid://e2q7k5n1w8m4d

src/Features/Interactions/Contracts/InteractionResult.cs

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+namespace Game.Features.Interactions.Contracts;
+
+public readonly record struct InteractionResult(InteractionStatus Status, string Message = "")
+{
+    public bool Success => Status == InteractionStatus.Success;
+
+    public static InteractionResult Ok() => new(InteractionStatus.Success);
+
+    public static InteractionResult Fail(InteractionStatus status, string message) => new(status, message);
+}

src/Features/Interactions/Contracts/InteractionResult.cs.uid

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+uid://f9w2d7k4m6q1x

src/Features/Interactions/Contracts/InteractionStatus.cs

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+namespace Game.Features.Interactions.Contracts;
+
+public enum InteractionStatus
+{
+    Success,
+    TargetNotFound,
+    Unavailable,
+    Rejected
+}

src/Features/Interactions/Contracts/InteractionStatus.cs.uid

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+uid://b4y9m3r6v1c8p

src/Features/Interactions/Contracts/InteractionTargetId.cs

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+using System;
+
+namespace Game.Features.Interactions.Contracts;
+
+public readonly record struct InteractionTargetId(Guid Value)
+{
+    public override string ToString() => Value.ToString();
+}

src/Features/Interactions/Contracts/InteractionTargetId.cs.uid

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+uid://c6m1v8q4r9x2k