Initial xDS Translator Design and Implementation

[danehans]

#16 specifies the need for an xDS Translator (XT) to translate IR resources to an xDS config. The XT details should be captured in this issue or a linked doc.

[skriss]

For reference, Contour's IR -> xDS translation logic is largely contained in this package: https://github.com/projectcontour/contour/tree/main/internal/envoy/v3

[danehans]

@skriss I assigned this issue to you based on the 5/24/22 community meeting notes. Please unassign yourself if that's not the case.

[skriss]

@skriss I assigned this issue to you based on the 5/24/22 community meeting notes. Please unassign yourself if that's not the case.

Removed my assignment, I'm going to focus on #32 and #38 to start. Happy to circle back to this later though if nobody has picked it up.