v1.10.2 patches: continent persistence, city markers, dynamic map center

C changes:
- gstorage.c: encode continent into root key for --persist --restore survival
- gholder.c: decode continent from root + lat/lng storage
- commons.h: add lat/lng fields to GMetrics struct
- geoip2.c/geoip1.h: extract coordinates from MMDB
- json.c: output lat/lng in geolocation JSON

JS changes:
- Remove cityIndex guard for static HTML city dots
- TopoJSON lat/lng fallback for city coordinates
- updateMap fallback city collection
- Dynamic orthographic center based on visitor count
- Mercator stays at [0,15] for full world view

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

TODO

@@ -0,0 +1,10 @@
+Copyright (C) 2009-2026
+6erardo Orellana <goaccess@prosoftcorp.com>
+
+For a more comprehensive list of to-do items, please refer to the GitHub site.
+https://github.com/allinurl/goaccess/issues
+
+or visit https://goaccess.io/faq#todo
+
+If you are interested in working on any of the items listed in there, email
+goaccess@prosoftcorp.com or better, open a new issue: