* fix: warning: deleted member function should be public [modernize-use-equals-delete]
* fix: warning: variable has inline specifier but is implicitly inlined [readability-redundant-inline-specifier]
* fix: warning: enum uses a larger base type than necessary for its value set [performance-enum-size]
* fix: warning: initializer for member is redundant [readability-redundant-member-init]
* warning: parameter is const-qualified in the function declaration; const-qualification of parameters only has an effect in function definitions [readability-avoid-const-params-in-decls]
* refactor: move tr_preallocation_mode info tr_open_files
* refactor: remove unnecessary error nullptr check
* refactor: use snake_case for private method names in inout.cc
* refactor: extract-method get_fd() from read_or_write_bytes()
* refactor: make function args const where possible
* refactor: simplify read_or_write_bytes()
* refactor: make buflen a uint64_t in read_or_write_piece()
* refactor: move tr_torrentStop() logic from read_or_write_piece() to tr_ioWrite()
* refactor: make tr_ioFoo() functions take a const torrent
* refactor: make tr_cache::close_torrent_files() take a tor_id instead of a torrent