[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>

applications/bad_usb/scenes/bad_usb_scene_file_select.c

@@ -5,14 +5,16 @@
 static bool bad_usb_file_select(BadUsbApp* bad_usb) {
     furi_assert(bad_usb);
 
-    // Input events and views are managed by file_select
-    bool res = dialog_file_select_show(
+    // Input events and views are managed by file_browser
+    bool res = dialog_file_browser_show(
         bad_usb->dialogs,
-        BAD_USB_APP_PATH_FOLDER,
+        bad_usb->file_path,
+        bad_usb->file_path,
         BAD_USB_APP_EXTENSION,
-        bad_usb->file_name,
-        sizeof(bad_usb->file_name),
-        NULL);
+        true,
+        &I_badusb_10px,
+        true);
+
     return res;
 }