Added worker app.

JSMR.Worker/Options/ScanOptions.cs

@@ -0,0 +1,11 @@
+namespace JSMR.Worker.Options;
+
+public sealed class ScanOptions
+{
+    public string? Locale { get; init; } = "Japanese"; // maps to your Locale enum
+    public int? StartPage { get; init; }              // if null, resume from checkpoint or 1
+    public int? EndPage { get; init; }                // optional cap
+    public int? PageSize { get; init; }               // override default
+    public bool Watch { get; init; }                  // loop forever
+    public TimeSpan Interval { get; init; } = TimeSpan.FromMinutes(5);
+}