BAZ-013: Add harness policy CLI tools

[rullopat]

Summary

• add canonical Team list/show/export/import commands with portable versioned interchange
• add Group-owned policy show/export/import/diff/evaluate/block-history commands
• add revision-safe dry-run/apply/force flows, stable exit codes, filters, completion, and docs

Verification

• pnpm test (94 files, 734 tests)
• pnpm typecheck
• pnpm --filter @bazilion/web typecheck
• pnpm lint (existing warnings only)
• pnpm build
• pnpm --filter @bazilion/web build
• focused BAZ-013 suite (4 files, 21 tests)
• git diff --check