MPU Hal (#1492)

* Furi HAL: memory protection unit
* Core: prohibit NULL dereferencing, even for reads.
* Applications: fix NULL dereference
* Core: stack protection by MPU
* MPU: stack region alignment
* Apps: fix null pointer dereferences
* Threads: fix non-null arg check
* Desktop settings: fix null pointer dereference
* Core: documented null-check hack
* Fix null dereference issues
* Apps: args check
* Core: naming fixes
* format code
* Core: remove NONNULL specifier
* FurHal: move MPU initialization to begining, fix enum naming

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

applications/music_player/music_player.c

@@ -300,7 +300,7 @@ int32_t music_player_app(void* p) {
     string_init(file_path);
 
     do {
-        if(p) {
+        if(p && strlen(p)) {
             string_cat_str(file_path, p);
         } else {
             string_set_str(file_path, MUSIC_PLAYER_APP_PATH_FOLDER);