[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/rpc/rpc_cli.c

@@ -38,6 +38,7 @@ static void rpc_session_terminated_callback(void* context) {
 }
 
 void rpc_cli_command_start_session(Cli* cli, string_t args, void* context) {
+    UNUSED(args);
     Rpc* rpc = context;
 
     uint32_t mem_before = memmgr_get_free_heap();