[FL-935] Queue-based SD app cycle. File select widget. (#388)

* SD App: more specific sd api
* Gui: view dispatcher fix api documentation
* Gui: view holder thingy
* SD App: do not sleep when working with sd card bus
* SD App: queue-based lifecycle
* Assets: sd-card assets
* SD App: init file select api

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

applications/sd-filesystem/sd-filesystem-api.c

@@ -27,10 +27,12 @@ bool _fs_init(SdFsInfo* _fs_info) {
 }
 
 bool _fs_lock(SdFsInfo* fs_info) {
+    api_hal_power_insomnia_enter();
     return (osMutexAcquire(fs_info->mutex, osWaitForever) == osOK);
 }
 
 bool _fs_unlock(SdFsInfo* fs_info) {
+    api_hal_power_insomnia_exit();
     return (osMutexRelease(fs_info->mutex) == osOK);
 }