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

Eventually, Settings will be removed

- 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.

Also, tests pass now, locally

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.

This commit extends the reverse proxy for the microservices so that it
would serve a custom `/config` file which would contain the correct
baseUrl to initialise the websocket connection correctly.

Still needs to fix some hardcoded URLs. The problem with websockets is
that they use the first URL fragment to determine the documentId,
therefore we cannot proxy to `http://localhost:8009/notes/<frameId>`
because the underlying WS connection will use `noteId=notes`, which is
wrong.

Basically, Gargantext.Prelude exports all of Protolude now.

This important commit introduces the 'DbCmd' constraint set, allowing DB
functions to require only a connection pool and some `GargConfig`.

This reverts commit b7e406b1.

First add New type NodeFrameVisio it this case:
	modified :         src/Gargantext/Database/Admin/Types/Node.hs
After this step, just follow the compiler errors to fix the instances.

	modified :         src/Gargantext/Prelude/Config.hs

The NodeType NodeFrameVisio is created in Database and need some
parameters:
	modified :         src/Gargantext/Database/Action/Node.hs
	modified :         src/Gargantext/Database/Admin/Config.hs
	modified :         src/Gargantext/Database/Admin/Types/Hyperdata/Default.hs

Finally:
	modified :         gargantext.ini_toModify
The url of the micro-service can be adapted in gargantext.ini