feat: add geolocation fields to session and implement geo stats endpoint

- Added country, city, countryCode, latitude, and longitude fields to the Session model.
- Updated geoip service to fetch and store geolocation data based on user IP.
- Created a new admin endpoint to retrieve geolocation statistics, including user counts by country and city.
- Enhanced admin page to display geolocation statistics with expandable city details.
- Introduced caching for geolocation data to optimize performance.

apps/frontend/src/lib/api/resources/admin.ts

@@ -2,6 +2,7 @@ import type {
   AdminBlockUserInput,
   AdminComplexListItem,
   AdminCreatePlanInput,
+  AdminGeoStats,
   AdminGlobalStats,
   AdminUpdatePlanInput,
   AdminUser,
@@ -77,6 +78,11 @@ export async function getGlobalStats() {
   return response.data;
 }
 
+export async function getGeoStats() {
+  const response = await http.get<AdminGeoStats>('/api/admin/geo-stats');
+  return response.data;
+}
+
 export async function getUserSessions(userId: string) {
   const response = await http.get<AdminUserSession[]>(`/api/admin/users/${userId}/sessions`);
   return response.data;