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/bad_usb/bad_usb_app.c

@@ -28,7 +28,7 @@ BadUsbApp* bad_usb_app_alloc(char* arg) {
 
     string_init(app->file_path);
 
-    if(arg != NULL) {
+    if(arg && strlen(arg)) {
         string_set_str(app->file_path, arg);
     }
 
@@ -79,7 +79,6 @@ void bad_usb_app_free(BadUsbApp* app) {
     furi_assert(app);
 
     // Views
-    view_dispatcher_remove_view(app->view_dispatcher, BadUsbAppViewFileSelect);
     view_dispatcher_remove_view(app->view_dispatcher, BadUsbAppViewWork);
     bad_usb_free(app->bad_usb_view);