Create centernet/disambiguation page

[k8hertweck]

Include page that describes Hutch-specific resources that identifies where to find specific information on centernet, and describing what we mean by things like "contact SciComp"

[vortexing]

@atombaby I think this could actually be a good use of the Glossary. We could do a fairly sizeable find/replace to add instructions to glossarized instances of scicomp.