[`pathlib`] Add missing features to `Path`

[LukeSavefrogs]

The following are a subset of features that would be cool to also have in Path:

• .stat()
• .owner()
• .group()
• .touch()
• .mkdir()
• .chmod()
• .rmdir()
• .rename()
• .symlink_to()
• .link_to()
• .is_dir()
• .is_file()