Add player leaderboard and homepage preview

shared/database.ts

@@ -520,6 +520,15 @@ export type Database = {
       [_ in never]: never;
     };
     Functions: {
+      player_leaderboard: {
+        Args: {
+          p_difficulty?: string;
+          p_search?: string;
+          p_page?: number;
+          p_limit?: number;
+        };
+        Returns: Json;
+      };
       submit_content_report: {
         Args: {
           p_dataset: string;