Add accessibility features to logo SVG

The logo SVG in the main menu has been improved for accessibility. Added 'role', 'aria-labelledby', 'title', and 'desc' attributes to the SVG. The 'title' and 'desc' provide descriptive text that can be read by screen readers, making the site more accessible for visually impaired users.

index.html

@@ -15,7 +15,9 @@
     <wallpaper id='bg'></wallpaper>
     <menu>
       <a href='https://wiki.xxiivv.com/site/home.html' id='logo'>
-        <svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg" height='33.0' width='160.0'>
+        <svg xmlns="http://www.w3.org/2000/svg" height='33.0' width='160.0' role="img" aria-labelledby="title desc">
+          <title id="title">xxiivv logo</title>
+          <desc id="desc">A continuous wave line drawing transitioning from a sine wave, to a square wave, and finally into a sawtooth wave.</desc>
           <path d='M 3.0 31.0 l 0 -22  a 7.5,7.5 0 1,1 15.0,0 l 0 15.0  a 7.5,7.5 0 0,0 15.0,0 l 0 -15.0 a 7.5,7.5 0 1,1 15.0,0 l 0 22.5  l 15.0 0  l 0 -30.0 l 15.0 0  l 0 30.0  l 15.0 0  l 0 -30.0 l 0.6 0  l 15.0 28.5  l 15.0 -27.0 l 15 28.5' stroke='white' stroke-width='1.5' fill='none' stroke-linecap='round'/>
         </svg>
       </a>