[FL-1818] System setting and debug options. RTC HAL refactoring. (#902)

* FuriHal: RTC API refactoring. System Setting application. FuriCore: adjustable log levels. Minor code cleanup.
* Storage: change logging levels for internal storage.
* FuriCore: fix broken trace logging level

firmware/targets/furi-hal-include/furi-hal-rtc.h

@@ -0,0 +1,52 @@
+/**
+ * @file furi-hal-rtc.h
+ * Furi Hal RTC API
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <main.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    // Time
+    uint8_t hour;   /**< Hour in 24H format: 0-23 */
+    uint8_t minute; /**< Minute: 0-59 */
+    uint8_t second; /**< Second: 0-59 */
+    // Date
+    uint8_t day;    /**< Current day: 1-31 */
+    uint8_t month;  /**< Current month: 1-12 */
+    uint16_t year;  /**< Current year: 2000-2099 */
+    uint8_t weekday;/**< Current weekday: 1-7 */
+} FuriHalRtcDateTime;
+
+typedef enum {
+    FuriHalRtcFlagDebug = (1<<0),
+    FuriHalRtcFlagFactoryReset = (1<<1),
+} FuriHalRtcFlag;
+
+/** Initialize RTC subsystem */
+void furi_hal_rtc_init();
+
+void furi_hal_rtc_set_log_level(uint8_t level);
+
+uint8_t furi_hal_rtc_get_log_level();
+
+void furi_hal_rtc_set_flag(FuriHalRtcFlag flag);
+
+void furi_hal_rtc_reset_flag(FuriHalRtcFlag flag);
+
+bool furi_hal_rtc_is_flag_set(FuriHalRtcFlag flag);
+
+void furi_hal_rtc_set_datetime(FuriHalRtcDateTime* datetime);
+
+void furi_hal_rtc_get_datetime(FuriHalRtcDateTime* datetime);
+
+#ifdef __cplusplus
+}
+#endif