Add small commands and activation state that make the Base demo easier to inspect.
Acceptance criteria:
- Add manifest-declared commands for environment inspection and manifest inspection.
- Keep the existing hello command.
- Expand .base/activate.sh with useful non-secret project state.
- Update demo/demo.sh and BATS tests to exercise the new commands.
- Avoid new runtime dependencies.
Add small commands and activation state that make the Base demo easier to inspect.
Acceptance criteria: