archive unused repositories in xmidt-org

[piccione99]

criteria to archive:

1. do we still use these repositories anywhere?
2. are they currently being actively used, updated from elsewhere?

List of OpenSource Candidates (probably not inclusive of all that can be archived) :
https://github.com/xmidt-org/heimdall - codex component
https://github.com/xmidt-org/codex-deploy - codex component
https://github.com/xmidt-org/go-parodus - replaced by xmidt-agent
https://github.com/xmidt-org/codex-db - codex component
https://github.com/xmidt-org/gungnir - codex component
https://github.com/xmidt-org/mimisbrunnr - codex component
https://github.com/xmidt-org/codex-deploy - codex component
https://github.com/xmidt-org/svalinn - codex componenet