* fixed: Scripts/Tools/std: callshift.bat, setshift.bat, xcopy_dir.bat, xcopy_file.bat, xmove_dir.bat, xmove_file.bat: flags parse
* fixed: Scripts/Tests: execution fixup
* new: Scripts/Tools/filesys/gen_dir_files_list*.bat: restore files from `contools.old` project
* new: Scripts/Tests/manual/batscripts/test_std__get_cmdline*.bat: `get_cmdline.bat` and `get_cmdline_len.bat` script tests
* new: Scripts/Tests/unit/batscripts/test_std__get_cmdline_var_len.bat: `get_cmdline_var_len.bat` script tests
* changed: Scripts/Tests/unit/batscripts/test_std__trim_var.bat: more tests
* refactor: Scripts/Tools, Scripts/Tests: code cleanup