[FL-3662] Do not remove file when renaming to itself (#3193)

* Do not allow overwriting a file with dir and support renaming file to itself
* Fix operator precedence error
* Add support for storage-specific path equivalence checks
* Fix typo
* Fix updater compilation
* Update Doxygen comments in storage.h

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

applications/services/storage/filesystem_api_internal.h

@@ -165,6 +165,13 @@ typedef struct {
  *      @param total_space pointer to total space value
  *      @param free_space pointer to free space value
  *      @return FS_Error error info
+ *
+ *  @var FS_Common_Api::equivalent_path
+ *      @brief Test whether two paths are equivalent (e.g differing case on a case-insensitive fs)
+ *      @param path1 first path to be compared
+ *      @param path2 second path to be compared
+ *      @param truncate if set to true, compare only up to the path1's length
+ *      @return true if path1 and path2 are considered equivalent
  */
 typedef struct {
     FS_Error (*const stat)(void* context, const char* path, FileInfo* fileinfo);
@@ -175,6 +182,7 @@ typedef struct {
         const char* fs_path,
         uint64_t* total_space,
         uint64_t* free_space);
+    bool (*const equivalent_path)(const char* path1, const char* path2);
 } FS_Common_Api;
 
 /** Full filesystem api structure */