Use the National Park typeface for the topbar wordmark

Self-hosted Bold woff2 only (the one weight .topbar__brand renders at)
under public/vendor/national-park-typeface/ — a router-carved-signage
display face for the "MAPTOOL" heading, matching the uppercase/
letter-spaced treatment it already had. Everything else stays on the
system font stack; this is a wordmark swap, not a body-text one.

docs/nps-resources.adoc/third-party-notices.adoc updated to record it.

docs/third-party-notices.adoc

@@ -63,6 +63,14 @@ SIL Open Font License, not BSD-3-Clause like the above:
 `256-511` only)
 | https://github.com/protomaps/basemaps-assets[protomaps/basemaps-assets]
 (`fonts/`, `OFL.txt` included alongside)
+
+| National Park (Bold weight only, `.woff2`), topbar wordmark
+(`.topbar__brand`, `public/css/style.css`) — see
+`docs/nps-resources.adoc`
+| https://nationalparktypeface.com[nationalparktypeface.com] (Ben
+Hoepner, Andrea Herstowski, Jeremy Shellhorn / DO Studio) — "published
+for free use under the SIL Open Font License" per the site; no
+`OFL.txt` ships in its own download zips, unlike Noto Sans above
 |===
 
 The online map style (not vendored, fetched at runtime when the