enable instance panel by default, added some content

[akkoma] / priv / static / instance / panel.html

<div style="margin-left:12px; margin-right:12px">
<p>Welcome to <a href="https://pleroma.social" target="_blank">Pleroma!</a></p>    
<p><a href="main/all">Pleroma FE</a> | <a href="web">Mastodon FE</a></p>
</div>