[FL-2491] File browser GUI module (#1237)

* File browser module and test app
* nfc: Add support for saved files in subdirectories
* nfc: Use helper function to get shadow path when loading data
* File browser dialog integration pt.1
* File browser dialog integration pt.2
* Gui,Dialogs: drop file select
* Correct use of dynamic string_t(string_ptr)

Co-authored-by: Yukai Li <yukaili.geek@gmail.com>
Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

lib/one_wire/ibutton/ibutton_key.h

@@ -68,20 +68,6 @@ const uint8_t* ibutton_key_get_data_p(iButtonKey* key);
  */
 uint8_t ibutton_key_get_data_size(iButtonKey* key);
 
-/**
- * Set key name
- * @param key 
- * @param name 
- */
-void ibutton_key_set_name(iButtonKey* key, const char* name);
-
-/**
- * Get pointer to key name
- * @param key 
- * @return const char* 
- */
-const char* ibutton_key_get_name_p(iButtonKey* key);
-
 /**
  * Set key type
  * @param key