Provide redirect maps in the form of a seperate yml file

[CallumWalley]

We have dozens of programmatically generated redirects. Much easier to put this in a separate file rather than clog up mkdocs.yml

[oprypin]

Hi thanks for the contribution.

I'm still thinking that the best option is for mkdocs itself to accept arbitrary files. I'll keep thinking about it

[reece]

What's the status of this PR? I also would prefer redirects in a separate file.

@oprypin : I don't understand your comment. What issue do you see with this PR?

[aburdenthehand]

+1 I came across this PR while trying to do exactly this.