[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_service/power.c

@@ -41,8 +41,8 @@ Power* power_alloc() {
     Power* power = malloc(sizeof(Power));
 
     // Records
-    power->notification = furi_record_open("notification");
-    power->gui = furi_record_open("gui");
+    power->notification = furi_record_open(RECORD_NOTIFICATION);
+    power->gui = furi_record_open(RECORD_GUI);
 
     // Pubsub
     power->event_pubsub = furi_pubsub_alloc();
@@ -89,8 +89,8 @@ void power_free(Power* power) {
     furi_pubsub_free(power->event_pubsub);
 
     // Records
-    furi_record_close("notification");
-    furi_record_close("gui");
+    furi_record_close(RECORD_NOTIFICATION);
+    furi_record_close(RECORD_GUI);
 
     free(power);
 }
@@ -203,7 +203,7 @@ int32_t power_srv(void* p) {
     (void)p;
     Power* power = power_alloc();
     power_update_info(power);
-    furi_record_create("power", power);
+    furi_record_create(RECORD_POWER, power);
 
     while(1) {
         // Update data from gauge and charger

applications/power/power_service/power.h

@@ -4,6 +4,8 @@
 #include <core/pubsub.h>
 #include <stdbool.h>
 
+#define RECORD_POWER "power"
+
 typedef struct Power Power;
 
 typedef enum {