textproc/py-mkdocs-exclude: new port: MkDocs plugin to exclude files from input using globs or regexps

Plugin for MkDocs that allows you to exclude files from your input using
unix-style wildcards (globs) or regular expressions (regexps).

WWW: https://github.com/apenwarr/mkdocs-exclude

PR: 286223
Reported by: Vladyslav Movchan <vladislav.movchan@gmail.com> (new maintainer)