Add project files.

ModVersionChecker/checkers/CheckerFactory.cs

@@ -0,0 +1,17 @@
+namespace ModVersionChecker
+{
+    public static class CheckerFactory
+    {
+        public static IVersionChecker CreateChecker(string type)
+        {
+            string[] parts = type.Split(':');
+
+            return parts[0].ToLower() switch
+            {
+                "scrape" => new ScrapeChecker(),
+                "api" => new ApiChecker(),
+                _ => throw new ArgumentException($"Unknown checker type: {type}")
+            };
+        }
+    }
+}