create file handles
testify_file_load
THandle *testify_file_load(char *path);
testify_file_save
THandle *testify_file_save(char *path);
testify_file_size
uint64 testify_file_size(THandle *handle);
testify_file_position_set
void testify_file_position_set(THandle *handle, uint64 pos);
testify_file_position_get
uint64 testify_file_position_get(THandle *handle);