AI: Carry map x/y coordinates through the markdown-to-C# generator

ZeroSpace/ZeroSpace.Build/Program.cs

@@ -571,6 +571,8 @@ static bool TryReadStarSystem(
         TryGetOptionalString(frontMatter, "occupationBuff"),
         TryGetOptionalString(frontMatter, "systemMastery"),
         connectedSystems,
+        GetDouble(frontMatter, "x"),
+        GetDouble(frontMatter, "y"),
         body);
     reason = string.Empty;
     return true;
@@ -666,6 +668,8 @@ static string GenerateStarSystems(IReadOnlyList<StarSystemSource> systems)
         builder.AppendLine($"        OccupationBuff: {Literal(system.OccupationBuff)},");
         builder.AppendLine($"        SystemMastery: {Literal(system.SystemMastery)},");
         builder.AppendLine($"        ConnectedSystems: [{string.Join(", ", system.ConnectedSystems.Select(Literal))}],");
+        builder.AppendLine($"        X: {system.X.ToString("R", CultureInfo.InvariantCulture)},");
+        builder.AppendLine($"        Y: {system.Y.ToString("R", CultureInfo.InvariantCulture)},");
         builder.AppendLine($"        Body: {Literal(system.Body)});");
         builder.AppendLine();
     }
@@ -738,6 +742,17 @@ static string BoolLiteral(bool value)
     return value ? "true" : "false";
 }
 
+static double GetDouble(IReadOnlyDictionary<string, FrontMatterValue> frontMatter, string key)
+{
+    if (frontMatter.TryGetValue(key, out var value) &&
+        double.TryParse(value.Scalar, NumberStyles.Float | NumberStyles.AllowThousands, CultureInfo.InvariantCulture, out var number))
+    {
+        return number;
+    }
+
+    return 0;
+}
+
 internal sealed class FrontMatterValue(string? scalar)
 {
     public string? Scalar { get; } = scalar;
@@ -777,6 +792,8 @@ internal sealed record StarSystemSource(
     string? OccupationBuff,
     string? SystemMastery,
     IReadOnlyList<string> ConnectedSystems,
+    double X,
+    double Y,
     string Body);
 
 internal sealed record SystemMasterySource(