[FL-2520] FW build with -Wextra (#1185)

* Fixing compiler warnings with -Wextra
* More warnings suppression, WIP
* Even more warning fixes
* Added new lines at end of text files.
* Padding fix
* Additional fixes to warnings on different build configurations; added -Wextra to default build pipeline
* Fixes for Secplus v1
* -additional warnings
* +-Wredundant-decls fixes
* FuriHal: print stack overflow task name in console
* FuriHal: add missing include

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

applications/system/system_settings.c

@@ -46,6 +46,7 @@ static void debug_changed(VariableItem* item) {
 }
 
 static uint32_t system_settings_exit(void* context) {
+    UNUSED(context);
     return VIEW_NONE;
 }
 
@@ -103,6 +104,7 @@ void system_settings_free(SystemSettings* app) {
 }
 
 int32_t system_settings_app(void* p) {
+    UNUSED(p);
     SystemSettings* app = system_settings_alloc();
     view_dispatcher_run(app->view_dispatcher);
     system_settings_free(app);