feat + fix: statistics microservice 01/04/23

.../main/java/cz/muni/fi/pa165/core/user/UserController.java

.../main/java/cz/muni/fi/pa165/core/user/UserRepository.java

...src/main/java/cz/muni/fi/pa165/core/user/UserService.java

.../cz/muni/fi/pa165/model/dto/metrics/MetricsCreateDto.java

...n/java/cz/muni/fi/pa165/model/dto/metrics/MetricsDto.java

.../cz/muni/fi/pa165/model/dto/metrics/MetricsUpdateDto.java

...muni/fi/pa165/model/dto/user/UserStatisticsCreateDto.java

...ni/fi/pa165/statistics/statistics/StatisticCreateDto.java

...i/fi/pa165/statistics/statistics/StatisticRepository.java

...muni/fi/pa165/statistics/statistics/StatisticService.java

...muni/fi/pa165/statistics/statistics/StatisticsFacade.java

...cz/muni/fi/pa165/statistics/statistics/UserStatistic.java

...pa165/statistics/statistics/UserStatisticsController.java

...uni/fi/pa165/statistics/statistics/UserStatisticsDto.java

.../fi/pa165/statistics/statistics/UserStatisticsMapper.java