Add multilingual language and systems learning tracks

tl/expanded-8-1/lesson-2/main.html

@@ -0,0 +1,5 @@
+<!doctype html>
+<html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1">
+<title>Agila study</title>
+<style>body{font:1.1rem system-ui;margin:2rem;background:#f4f2fb;color:#21143e} main{max-width:40rem;margin:auto;padding:1.5rem;background:white;border:2px solid #56329a;border-radius:12px}button{padding:1rem}</style>
+<main><h1>My study plan</h1><p>Resize the preview. Keep this text readable.</p><button>Start</button></main></html>