Dependency on kibana is undesirable

Sense now requires elasticsearch and kibana to be installed. This is sub optimal as kibana uses up unnecessary memory in tightly constrained environments. For example when deploying a docker container containing elasticsearch, it is now necessary to run a seperate docker container to run kibana and link the two together.

Ideally it would be possible to install sense as an elasticsearch plugin.

The issue does not name files, tests, or entry points. Start by investigating how Sense currently depends on Kibana and how Elasticsearch plugins are packaged and installed. Done means Sense can be installed as an Elasticsearch plugin without requiring a separate Kibana container.

Written by the indexing model from the issue text.