Integrate HTTP server

[whilo]

Describe the feature you would like to request

Integrate datahike-server in a mono repo style and provide a transparent clj client for datahike.api.

Describe the solution you would like

Describe alternatives you've considered

[awb99]

The webserver should nit be in the default library. This will just add a whole bunch of depencies

[TimoKramer]

@awb99 no worries, @whilo is working on another solution

[whilo]

@awb99 At the moment we will add a dependency to https://github.com/babashka/http-client, is that a problem as well? I am thinking about removing it, but it will limit default datahike to not work distributed. Which maybe is fine.

[whilo]

Closed with #639.