[FL-3226] Deep Sleep Idle (#2569)

* Improve RNG error handling
* Sync RTC shadow registers on Stop mode exit
* Implement working STOP2 mode
* Fix formatting
* FuriHal: disable SWD pins if debug is disabled
* Power: cleanup battery info view, handle zero current report from gauge
* Fbt: add command line argument for extra global defines
* FuriHal: cleanup debug defines in power and os, drop deep_insomnia counter.
* Add a setting to disable deep sleep
* Clean up furi_hal_power
* FuriHal,FapLoader,Debug: implement debug in stop mode, workaround resume in stop
* FuriHal: document OS and power subsystems debugging
* Furi: enable debug interface on crash

---------

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

firmware/targets/furi_hal_include/furi_hal_debug.h

@@ -18,6 +18,9 @@ void furi_hal_debug_enable();
 /** Disable MCU debug */
 void furi_hal_debug_disable();
 
+/** Check if GDB debug session is active */
+bool furi_hal_debug_is_gdb_session_active();
+
 #ifdef __cplusplus
 }
 #endif

firmware/targets/furi_hal_include/furi_hal_power.h

@@ -58,12 +58,6 @@ void furi_hal_power_insomnia_exit();
  */
 bool furi_hal_power_sleep_available();
 
-/** Check if deep sleep availble
- *
- * @return     true if available
- */
-bool furi_hal_power_deep_sleep_available();
-
 /** Go to sleep
  */
 void furi_hal_power_sleep();

firmware/targets/furi_hal_include/furi_hal_rtc.h

@@ -30,6 +30,7 @@ typedef enum {
     FuriHalRtcFlagLock = (1 << 2),
     FuriHalRtcFlagC2Update = (1 << 3),
     FuriHalRtcFlagHandOrient = (1 << 4),
+    FuriHalRtcFlagLegacySleep = (1 << 5),
 } FuriHalRtcFlag;
 
 typedef enum {
@@ -85,6 +86,9 @@ void furi_hal_rtc_deinit_early();
 /** Initialize RTC subsystem */
 void furi_hal_rtc_init();
 
+/** Force sync shadow registers */
+void furi_hal_rtc_sync_shadow();
+
 /** Get RTC register content
  *
  * @param[in]  reg   The register identifier