[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/music_player/music_player_cli.c

@@ -4,6 +4,7 @@
 #include "music_player_worker.h"
 
 static void music_player_cli(Cli* cli, string_t args, void* context) {
+    UNUSED(context);
     MusicPlayerWorker* music_player_worker = music_player_worker_alloc();
     Storage* storage = furi_record_open("storage");