feat(hal): expose rename() on HalStorage

Forward SDCardManager::rename() through the HAL layer for
file/directory move operations needed by book archiving.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/hal/HalStorage.h

@@ -29,6 +29,7 @@ class HalStorage {
   bool exists(const char* path);
   bool remove(const char* path);
   bool rmdir(const char* path);
+  bool rename(const char* path, const char* newPath);
 
   bool openFileForRead(const char* moduleName, const char* path, FsFile& file);
   bool openFileForRead(const char* moduleName, const std::string& path, FsFile& file);