Split viewer and simulation into separate apps

apps/backend/Contracts/WorldContracts.cs

@@ -0,0 +1,76 @@
+namespace SpaceGame.Simulation.Api.Contracts;
+
+public sealed record WorldSnapshot(
+  string Label,
+  int Seed,
+  DateTimeOffset GeneratedAtUtc,
+  IReadOnlyList<SystemSnapshot> Systems,
+  IReadOnlyList<ResourceNodeSnapshot> Nodes,
+  IReadOnlyList<StationSnapshot> Stations,
+  IReadOnlyList<ShipSnapshot> Ships,
+  IReadOnlyList<FactionSnapshot> Factions);
+
+public sealed record SystemSnapshot(
+  string Id,
+  string Label,
+  Vector3Dto Position,
+  string StarColor,
+  float StarSize,
+  IReadOnlyList<PlanetSnapshot> Planets);
+
+public sealed record PlanetSnapshot(
+  string Label,
+  float OrbitRadius,
+  float Size,
+  string Color,
+  bool HasRing);
+
+public sealed record ResourceNodeSnapshot(
+  string Id,
+  string SystemId,
+  Vector3Dto Position,
+  float OreRemaining,
+  float MaxOre,
+  string ItemId);
+
+public sealed record StationSnapshot(
+  string Id,
+  string Label,
+  string Category,
+  string SystemId,
+  Vector3Dto Position,
+  string Color,
+  int DockedShips,
+  float OreStored,
+  float RefinedStock,
+  string FactionId);
+
+public sealed record ShipSnapshot(
+  string Id,
+  string Label,
+  string Role,
+  string ShipClass,
+  string SystemId,
+  Vector3Dto Position,
+  string State,
+  string? OrderKind,
+  string DefaultBehaviorKind,
+  string ControllerTaskKind,
+  float Cargo,
+  float CargoCapacity,
+  string? CargoItemId,
+  string FactionId,
+  float Health,
+  IReadOnlyList<string> History);
+
+public sealed record FactionSnapshot(
+  string Id,
+  string Label,
+  string Color,
+  float Credits,
+  float OreMined,
+  float GoodsProduced,
+  int ShipsBuilt,
+  int ShipsLost);
+
+public sealed record Vector3Dto(float X, float Y, float Z);