[FL-2430] Automatic Desktop Locking (#1101)

* Add Auto Lock Time setting
* Update .gitignore
* Add value_index toolbox module
* Auto locking basic implementation
* Better AutoLock implementation, edge cases and cleanup
* Fix NULL pointer crash
* Turn off backlight shortly in locked mode
* Re-enable auto lock after pin lock
* Correctly handle start when pin locked
* Use timer to hide locked hint
* Use a single state variable instead of multiple bools
* Do not call update callback recursively
* Allow input when the Unlocked hint is shown
* Add a delay to backlight switch off while locking
* Better user input handling
* Switch backlight off after pin timeout
* Correct grammar in notification settings

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

applications/desktop/desktop_i.h

@@ -19,6 +19,7 @@
 #include <gui/scene_manager.h>
 
 #include <loader/loader.h>
+#include <notification/notification_app.h>
 
 #define STATUS_BAR_Y_SHIFT 13
 
@@ -59,10 +60,18 @@ struct Desktop {
     ViewPort* lock_viewport;
 
     AnimationManager* animation_manager;
+
     Loader* loader;
+    NotificationApp* notification;
+
     FuriPubSubSubscription* app_start_stop_subscription;
+    FuriPubSub* input_events_pubsub;
+    FuriPubSubSubscription* input_events_subscription;
+    osTimerId_t auto_lock_timer;
 };
 
 Desktop* desktop_alloc();
 
 void desktop_free(Desktop* desktop);
+void desktop_lock(Desktop* desktop);
+void desktop_unlock(Desktop* desktop);