Add phase 1 critical import tool

src/RolemasterDb.ImportTool/ImportCommandResult.cs

@@ -0,0 +1,9 @@
+namespace RolemasterDb.ImportTool;
+
+public sealed class ImportCommandResult(string tableSlug, int columnCount, int rollBandCount, int resultCount)
+{
+    public string TableSlug { get; } = tableSlug;
+    public int ColumnCount { get; } = columnCount;
+    public int RollBandCount { get; } = rollBandCount;
+    public int ResultCount { get; } = resultCount;
+}