Now everything is in Core/Config

I moved HasConfig to Core/Config instead of it being in Database.Prelude

Eventually, Settings will be removed

Also, changed exceptions to safe

Also, fix for notifications throttle delay value

This commit maps the "Publish" action inside CodiMD/HedgeDoc to the
share URL feature.

This commit improves a bit the ShareURL internal API by wrapping the
returned URL into a proper `ShareURL` type (that internally uses a typed
representation for the URL).

While doing this, I have also fixed a bug in the current implementation
of ThrowAll (formerly named `throwAll'`).

This commit moves `GargConfig` and the other config-related
data structures back into gargantext, so that they can be edited
and expanded without needing to worry about the prelude project.

Using goldenVsStringDiff creates problems with CI trying to locale
`gargantext-cli -- golden-file-diff`.