[code-watcher] init module.

modules/CodeWatcher/StringExtension.cs

@@ -0,0 +1,17 @@
+namespace West.TelegramBot.CodeWatcher;
+
+public static class StringExtension
+{
+    // https://stackoverflow.com/a/23408020
+    public static IEnumerable<string> SplitToLines(this string input)
+    {
+        using (var reader = new StringReader(input))
+        {
+            string line;
+            while ((line = reader.ReadLine()) != null)
+            {
+                yield return line;
+            }
+        }
+    }
+}