v0.14.1

Changed

• brigade init is now additive on an existing target instead of aborting: it keeps existing files (never clobbers without --force), writes only the missing ones, and always wires the brigade-work skill into the harness skill dirs. This fixes the upgrade/brownfield gap found in onboarding smoke tests, where a repo that already had AGENTS.md/CLAUDE.md (every previously-onboarded repo, and most real projects) got nothing wired because init refused to overwrite and exited. Re-running init after upgrading now wires the work loop without losing local edits; --force still overwrites to refresh the bootstrap directives.