soong-setup

Record what this repo needs for soong's skills to run - whether it uses Notion at all and which roadmap and task databases it maps to, and whether its commits carry a Conventional Commits scope. Use when the user runs /soong-setup, when another skill reports the repo is not configured, or when the user wants to change what a repo is configured for. A repo can record that it does not use Notion, which settles that capability for good. Stops without writing anything if the user says the repo uses Notion but does not supply valid databases.