- 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

This commit does two things: it reports the status of the microservices
proxy in the `portRouteInfo`, so that if that's disabled we would
immediately know, and it also stop spawn the proxy `Application` in case
it's disabled. This wasn't the case before; previously we would be
spawing the proxy process even though it was "morally" disabled.

Updatd from the old `.dhall` format to the new `.toml` format
using a script provided by the author of Weeder:
https://github.com/ocharles/weeder/issues/130

- edit bin/update-project-dependencies
- fix the values of :
  - sha256sum cabal.project
  - sha256sum cabal.project.freeze
- nix-shell $ ./bin/update-project-dependencies
- git add -u
- git commit