OS-independent wrapper for shlex and mslex

oslex is an OS-independent wrapper for shlex and mslex. Its main purpose is to provide functions similar in functionality to shlex.quote(), shlex.split(), and shlex.join() on both Windows and POSIX-compatible platforms. It achieves this by forwarding calls to the standard library's `shlex` on POSIX systems or the `mslex` library on Windows. The current version is 0.1.3, with the last release in July 2023.