[FL-2675] /int space reservation (#1448)

* storage: added global #defines for /int, /ext & /any
* storage: introduced PATH_EXT, PATH_INT& PATH_ANY macros
* core apps: moved hardcoded config files names to separate headers; prefixed them with "."; updater: added file name migration to new naming convention on backup extraction
* storage: fixed storage_merge_recursive handling of complex directory structures; storage_move_to_sd: changed data migration logic to all non-dot files & all folders
* core: added macro aliases for core record names
* Bumped protobuf commit pointer
* storage: reserved 5 pages in /int; denying write&creation of non-dot files when running out of free space

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

applications/music_player/music_player_cli.c

@@ -6,7 +6,7 @@
 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");
+    Storage* storage = furi_record_open(RECORD_STORAGE);
 
     do {
         if(storage_common_stat(storage, string_get_cstr(args), NULL) == FSE_OK) {
@@ -31,17 +31,17 @@ static void music_player_cli(Cli* cli, string_t args, void* context) {
         music_player_worker_stop(music_player_worker);
     } while(0);
 
-    furi_record_close("storage");
+    furi_record_close(RECORD_STORAGE);
     music_player_worker_free(music_player_worker);
 }
 
 void music_player_on_system_start() {
 #ifdef SRV_CLI
-    Cli* cli = furi_record_open("cli");
+    Cli* cli = furi_record_open(RECORD_CLI);
 
     cli_add_command(cli, "music_player", CliCommandFlagDefault, music_player_cli, NULL);
 
-    furi_record_close("cli");
+    furi_record_close(RECORD_CLI);
 #else
     UNUSED(music_player_cli);
 #endif