Base v1.6.0

Added

• Added an explicit linux-lab prerequisite profile that checks and installs
  Multipass via Homebrew cask for local Ubuntu lab VMs without creating VM
  instances during Base setup.

Changed

• Bound Base CI source-checkout jobs to the published base-bash-libs v1.1.0
  release commit.

Fixed

• Stopped basectl from continuing under Rosetta when it resolves native
  Apple Silicon Homebrew at /opt/homebrew, so setup fails early with Bash
  recovery guidance instead of breaking during a later brew install.
• Replaced stray shell run calls in setup's virtualenv and apt install paths
  with direct command execution so spawned basectl setup runs do not depend on
  a test-harness helper.
• Stopped default project checks from failing Ubuntu/Linux acceptance solely
  because manifest-declared IDE extension CLIs such as code are not on PATH;
  IDE extension diagnostics now run with the developer profile.
• Made the tool:bats-core project artifact platform-aware on Ubuntu/Debian,
  mapping it to the system bats package instead of planning a Homebrew
  brew install bats-core command.
• Preflighted mise trust before basectl setup runs mise install, so
  untrusted project configs fail with a Base recovery message instead of raw
  lower-level mise install output.
• Bootstrapped mise during Ubuntu/Debian project setup when a manifest
  declares a project-owned mise config, while keeping the mutation guarded by
  --dry-run review and --yes.
• Bootstrapped uv during Ubuntu/Debian project setup when a manifest
  explicitly opts into python.manager: uv or runner: uv, while keeping the
  mutation guarded by --dry-run review and --yes.
• Allowed repeated Ubuntu/Debian basectl setup runs without --yes when all
  apt prerequisites are already installed, while still requiring --yes before
  Base mutates apt-managed system packages.
• Made basectl setup --profile dev, check --profile dev, and
  doctor --profile dev use apt-backed BATS, GitHub CLI, and ShellCheck
  handling on Ubuntu/Debian instead of requiring Homebrew.
• Made explicit project setup/check routing ignore active-project virtualenv
  overrides from a different shell project, so commands such as
  basectl setup base-demo cannot accidentally reuse the base venv.
• Made project Brewfile delegates platform-aware: macOS still runs Homebrew
  brew bundle, while Ubuntu/Debian skips Brewfile setup/check as a warning so
  uv-managed projects can proceed through uv sync.