[FL-2432], [FL-2487] Rework bt keys load and save (#1139)

* bt keys: rework load and save with saved_struct
* bt: rename bt keys storage functions
* furi_hal_nfc: allow context switch during emilation
* bt settings: rework with saved struct
* infrared: replace file worker with dialogs and storage
* Core, Loader: fix thread allocation tracking, much better, so wow.

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

applications/infrared/infrared_app_brute_force.cpp

@@ -5,7 +5,6 @@
 #include <memory>
 #include <m-string.h>
 #include <furi.h>
-#include <file_worker_cpp.h>
 
 void InfraredAppBruteForce::add_record(int index, const char* name) {
     records[name].index = index;