Hnefatafl: Copenhagen and Tablut, a board that ages with the older game, and a bot that looks three moves ahead

The rules are data in rules.ts; the engine plays custodial capture, the
king's own capture rule on and beside the throne, corner and edge
escape, shieldwalls, edge forts, encirclement, repetition and stalemate;
twenty tests pin them and play a bot game to a verdict on both boards.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG

static/favicon.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><rect width="32" height="32" rx="6" fill="#121a20"/><circle cx="16" cy="16" r="8" fill="none" stroke="#e9e2d2" stroke-width="2.5"/><circle cx="16" cy="16" r="2.5" fill="#f0a53a"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><rect width="32" height="32" rx="6" fill="#8a5a2b"/><circle cx="16" cy="17" r="9" fill="#f0d58a" stroke="#a67c1a" stroke-width="1.5"/><path d="M9 20v-8l3.5 4 3.5-6 3.5 6 3.5-4v8z" fill="#6b4a0f"/></svg>