feat: add spec-driven-with-beads schema#1

mehmood-baryalai wants to merge 4 commits into

intent-driven-dev:mainintent-driven-dev/openspec-schemas:mainfrom

mehmood-baryalai:add-spec-driven-with-beadsmehmood-baryalai/openspec-schemas:add-spec-driven-with-beadsCopy head branch name to clipboard