add dev-util to import release-docs from production for local testing

[syphar]

I'm currently not sure yet if this is worth the LOC,

but since building the builder & running builds is quite slow on my machine, this helps me to quickly have valid docs in a previously empty database. ( in my personal dev workflow containers / images / volumes are regularly deleted)

You can run it by just cd into the directory of the binary crate, and then just

cargo run -- regex 
# or 
cargo run -- regex '~1' 

( the version identifier understands the same things as docs.rs semver itself).

For now it only works for successful builds, and it likely will fail for older versions.

@GuillaumeGomez what do you think? Does it work for you? I remember you also thought about something similar, but simpler.

I didn't want to add it to the admin cli, since it's not for the server, but only for local usage.

[GuillaumeGomez]

Sounds like a good idea. Please add docs.

[syphar]

Sounds like a good idea. Please add docs.

@GuillaumeGomez I now mention it in the readme.

Did the command work for you too?

[GuillaumeGomez]

Yup, all good for me now, thanks!