Now everything is in Core/Config

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

Eventually, Settings will be removed

Remove allow-newer:*, allow-older:* in cabal.project file and instead
list these explicitly. This is a big step for managing dependencies.

Maybe TBQueue is broken on CI:
https://github.com/haskell/stm/issues/76

Also, changed exceptions to safe

- Re-enable orphan warnings that were manually disabled in many modules
- Remove non-Haskell files that were just sitting in the source tree
- Remove modules that were not called from anywhere
- Remove unused dependencies

This is not exhaustive by any means. In particular, some more weeding out
can be achieved by looking at individual functions and even branches of
functions. Weeder can help with that.

Merge remote-tracking branch 'origin/393-api-openalex-fix-adapt-ngrams_url-field-following-an-api-change-causing-an-externalapierror' into dev

Also, set gargantext-settings.toml as the default file