Add multilingual Agila learning examples and Git practice guide

tl/flying-v-lifecycle/main.fv

@@ -0,0 +1,15 @@
+import agila
+
+fn main() {
+    mut app := agila.new_app('dev.student.study', 'Kaagapay sa Pag-aaral') or {
+        eprintln(err.msg())
+        return
+    }
+    app.start() or {
+        eprintln(err.msg())
+        return
+    }
+    app.request(.ui) or { eprintln(err.msg()) }
+    agila.log('Handa nang mag-aral')
+    app.stop()
+}