logics-bootstrapper

Bootstrap the Logics directory structure in a new repository (create `logics/architecture`, `logics/product`, `logics/request`, `logics/backlog`, `logics/tasks`, `logics/specs`, `logics/external`) and add `.gitkeep` files for empty folders so the structure stays versioned. Use when setting up Logics in a fresh project or validating that required directories exist.