docs: redirect /doc/cml to cml.dev/doc

[casperdcl]

Now that iterative/cml.dev#60 is merged,

• https://dvc.org/doc/cml/ should 301 redirect to https://cml.dev/doc/
• current /content/docs/cml/ stuff in this repo can be removed

Part of iterative/cml#514

[jorgeorpinel]

Please coordinate with me to try and redirect the ranking from Google Search Console too.

[casperdcl]

@jorgeorpinel is this (hopefully not impossible) search stuff related to the redirection implementation in this repo, or can it be tackled separately?

[jorgeorpinel]

Can def. be tackled separately. There might just be a time window where the ranking redirection is possible. So ideally letr's do both at the same time.

[casperdcl]

Can def. be tackled separately. There might just be a time window where the ranking redirection is possible. So ideally letr's do both at the same time.

done with implementation (#2658) so please lemme know @jorgeorpinel if you need to coordinate about search console stuff.

[jorgeorpinel]

Well up to you really. Do you want to preserve traffic? 🙂 I posted on our chat but didn't have a reply yet. Will tag you.