Add time-of-flight data to debugging webpage.

Change-Id: I317583f9ce51db5a1e89a0b82f24b946d2740741
Signed-off-by: James Kuszmaul <jabukuszmaul@gmail.com>
diff --git a/y2023/www/field.html b/y2023/www/field.html
index cc89bb9..6bd2fc0 100644
--- a/y2023/www/field.html
+++ b/y2023/www/field.html
@@ -56,6 +56,10 @@
       <td>Game Piece Held</td>
       <td id="game_piece"> NA </td>
     </tr>
+    <tr>
+      <td>Game Piece Position (+ = left, 0 = empty)</td>
+      <td id="game_piece_position"> NA </td>
+    </tr>
   </table>
 
   <table>