feat: HTML man pages

montaukos.org/docs/index.html

@@ -103,6 +103,10 @@
         <a href="usersmanual/index.html">User's Manual</a>
         <p>Manual for users of MontaukOS.</p>
     </li>
+    <li>
+        <a href="man/index.html">Man Pages</a>
+        <p>MontaukOS manual pages, also viewable with the man command.</p>
+    </li>
 </ul>
 
 <hr>