M*LIB: non-inlined strings, FuriString primitive (#1795)

* Quicksave 1
* Header stage complete
* Source stage complete
* Lint & merge fixes
* Includes
* Documentation step 1
* FBT: output free size considering BT STACK
* Documentation step 2
* py lint
* Fix music player plugin
* unit test stage 1: string allocator, mem, getters, setters, appends, compare, search.
* unit test: string equality
* unit test: string replace
* unit test: string start_with, end_with
* unit test: string trim
* unit test: utf-8
* Rename
* Revert fw_size changes
* Simplify CLI backspace handling
* Simplify CLI character insert
* Merge fixes
* Furi: correct filenaming and spelling
* Bt: remove furi string include

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

applications/services/dialogs/dialogs.h

@@ -1,7 +1,6 @@
 #pragma once
 #include <furi.h>
 #include <gui/canvas.h>
-#include "m-string.h"
 #include <gui/modules/file_browser.h>
 
 #ifdef __cplusplus
@@ -56,8 +55,8 @@ void dialog_file_browser_set_basic_options(
  */
 bool dialog_file_browser_show(
     DialogsApp* context,
-    string_ptr result_path,
-    string_ptr path,
+    FuriString* result_path,
+    FuriString* path,
     const DialogsFileBrowserOptions* options);
 
 /****************** MESSAGE ******************/