Add UDS Core as a conformant stack

Conformant Stack

Name: UDS Core

Description: A FOSS secure runtime platform for mission-critical capabilities. UDS should meet all existing requirements for the BBCS (will create the MR and validate this)

Current Repository URL (repo1, github, gitlab, etc): https://github.com/defenseunicorns/uds-core , also mirrored to repo1 already https://repo1.dso.mil/platform-one/distros/defense-unicorns/uds-core