[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/power/power_cli.c

@@ -8,7 +8,7 @@
 void power_cli_off(Cli* cli, string_t args) {
     UNUSED(cli);
     UNUSED(args);
-    Power* power = furi_record_open("power");
+    Power* power = furi_record_open(RECORD_POWER);
     printf("It's now safe to disconnect USB from your flipper\r\n");
     furi_delay_ms(666);
     power_off(power);
@@ -138,11 +138,11 @@ void power_cli(Cli* cli, string_t args, void* context) {
 
 void power_on_system_start() {
 #ifdef SRV_CLI
-    Cli* cli = furi_record_open("cli");
+    Cli* cli = furi_record_open(RECORD_CLI);
 
     cli_add_command(cli, "power", CliCommandFlagParallelSafe, power_cli, NULL);
 
-    furi_record_close("cli");
+    furi_record_close(RECORD_CLI);
 #else
     UNUSED(power_cli);
 #endif