Add multilingual language and systems learning tracks

en/expanded-23-1/README.md

@@ -0,0 +1,9 @@
+# Build Open Agila OS · 1
+
+[Agila University track](https://edu.agilaos.com/track.php?track=23&lang=en)
+
+About 15 minutes per lesson. Predict, run, change, explain, then complete the check in University.
+
+- [Lesson 1: Build the public kernel prototype](lesson-1/lesson.html)
+- [Lesson 2: Trace initialization honestly](lesson-2/lesson.html)
+- [Lesson 3: Model page translation](lesson-3/lesson.html)