[FL-3897] Happy mode (#3863)

* feat: happy mode
* feat: remove sad dolphin when powering off in happy mode
* style: address review comments
* Dolphin: add missing furi_checks
* Komi: add missing region initialization on startup

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

applications/services/dolphin/dolphin_i.h

@@ -13,6 +13,8 @@ typedef enum {
     DolphinEventTypeFlush,
     DolphinEventTypeLevel,
     DolphinEventTypeReloadState,
+    DolphinEventTypeSettingsGet,
+    DolphinEventTypeSettingsSet,
 } DolphinEventType;
 
 typedef struct {
@@ -21,6 +23,7 @@ typedef struct {
     union {
         DolphinDeed deed;
         DolphinStats* stats;
+        DolphinSettings* settings;
     };
 } DolphinEvent;