Re-generate a mkdocs.yml file with redirects

[leeyspaul]

I've got a small script going that will generate a new mkdocs.yml file from any renamed files in git status. It'd be nice to have a similar functionality with this plugin that will automatically add the redirects for me as it's quite a laborious process to add each individual change (especially for large changes) at once.

Is this something we could look into?

Thanks for the awesome plugin!