docs: Move some documentation to be internal
docs: Move some documentation to be internal

This wasn't really relevant to eos-knowledge-lib and instead contained
documentation about things that external contributors can't access. Moved
internally.

https://phabricator.endlessm.com/T14835

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib