Previously the site had no favicon — browsers showed a generic tab
icon and PWA installs would have used the default. Adds:
- packages/chess/public/favicon.svg — knight on a dark rounded tile,
purpose-built for small sizes (fill-only, high contrast).
- <link rel=icon type=image/svg+xml> + apple-touch-icon wiring in
index.html so the SVG serves as the primary tab icon on every
platform (Chrome/Firefox/Safari desktop + iOS home-screen).
- theme-color (#0f172a) matching the favicon tile so mobile
browser chrome coordinates with the site's dark accent.
- meta description for search-result snippets and link previews.
Product name: Houserules \u2014 chess with the rules you negotiate at the
table, not the ones FIDE hands you. Updated the three user-visible
strings: browser title, game-view header, lobby header. Kept the
@paratype/* npm scope intact since those are technical internals.
New tagline on the lobby: "Chess. Your rules." replacing the more
verbose "Realtime multiplayer with custom rules"; the shorter phrase
leans into the product name rather than describing features.
