[Pages][m]: Add stub pages for learn, doc and gallery

docs/components/Footer/index.jsx

@@ -0,0 +1,16 @@
+import styles from '../../styles/Home.module.css'
+
+export default function Footer() {
+    return (
+        <footer className={styles.footer}>
+            <a
+                href="https://www.datopian.com/"
+                target="_blank"
+                rel="noopener noreferrer"
+            >
+                Built by{' '}
+                <img src="/datopian-logo.png" alt="Datopian Logo" className={styles.logo} />
+            </a>
+        </footer>
+    )
+}