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>

snap/snapcraft.yaml

@@ -0,0 +1,28 @@
+name: goaccess
+version: git
+summary: Real-time web log analyzer and interactive viewer
+description: |
+  GoAccess is a real-time web log analyzer and interactive viewer that runs
+  in a terminal in *nix systems or through your browser.
+confinement: classic
+grade: devel
+
+apps:
+  goaccess:
+    command: bin/goaccess
+
+parts:
+  goaccess:
+    plugin: autotools
+    source: .
+    configflags:
+      - --enable-utf8
+      - --enable-geoip=legacy
+    build-packages:
+      - gettext
+      - libncurses-dev
+      - libncursesw5-dev
+      - libgeoip-dev
+    stage-packages:
+      - libgeoip-dev
+