FR: Add user centric dashboard filtering

What I would like The ability to filter a dashboard to only advertise issues/PRs that I am involved with as either a reviewer, assignee, creator etc. This would enable the k8s/test-infra project to migrate from the Gubernator PR Dashboard to Triage Party and most likely deprecate the rest of the that service.

What is needed OAuth with GitHub needs to be added so Triage Party has some understanding of what user is active and interested. Gubernator login can be used as reference.

FE changes to allow users to specify their ID and a way to tell TriageParty they are only interested in their own issues.