chore(home): add commented experimental anki sync config

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Co-Authored-By: Claude <noreply@anthropic.com>

home/modules/anki.nix

@@ -1,3 +1,6 @@
 {
   enable = true;
+  # sync = {
+  #   username = config.sops.secrets."email/personal".path;
+  # };
 }