feat: add get all games

storage/dao/postgresql/database_postgresql_games.go

@@ -8,7 +8,30 @@ import (
 )
 
 func (db *DatabasePostgreSQL) GetAllGames() ([]*model.Game, error) {
-	return nil, nil
+	q := `
+		SELECT g.id, g.server_id, g.user_id, g.created_at, g.updated_at
+		FROM public.game g
+	`
+	rows, err := db.session.Query(q)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	games := make([]*model.Game, 0)
+	for rows.Next() {
+		server := model.Server{}
+		user := model.User{}
+		game := model.Game{
+			Server: server,
+		}
+		err := rows.Scan(&game.ID, &server.ID, &user.ID, &game.CreatedAt, &game.UpdatedAt)
+		if err != nil {
+			return nil, err
+		}
+		games = append(games, &game)
+	}
+	return games, nil
 }
 
 func (db *DatabasePostgreSQL) GetGameById(id string) (*model.Game, error) {