[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/bt/bt_debug_app/bt_debug_app.c

@@ -19,10 +19,12 @@ void bt_debug_submenu_callback(void* context, uint32_t index) {
 }
 
 uint32_t bt_debug_exit(void* context) {
+    UNUSED(context);
     return VIEW_NONE;
 }
 
 uint32_t bt_debug_start_view(void* context) {
+    UNUSED(context);
     return BtDebugAppViewSubmenu;
 }
 
@@ -94,6 +96,7 @@ void bt_debug_app_free(BtDebugApp* app) {
 }
 
 int32_t bt_debug_app(void* p) {
+    UNUSED(p);
     if(furi_hal_bt_get_radio_stack() != FuriHalBtStackHciLayer) {
         FURI_LOG_E(TAG, "Incorrect radio stack, replace with HciLayer for tests.");
         DialogsApp* dialogs = furi_record_open("dialogs");