hooks: autoformat on Edit/Write for all collectives

[BryanChasko]

context

ran npm run lint manually multiple times in chrome-extension-moodle-uploader session. shannon already has a PostToolUse autoformat hook that delegates to a core formatter — this project now has one too, but each collective implements it separately

what

centralize the autoformat hook in heraldstack-infra:

• heraldstack-infra/scripts/autoformat.sh — core formatter, detects project type (node/python/go), runs appropriate formatter
• each collective's .claude/hooks/autoformat.sh delegates to the core script
• PostToolUse matcher: Edit|Write, 30s timeout

reference

shannon: .claude/hooks/autoformat.sh delegates to heraldstack-infra/scripts/autoformat.sh --claude

acceptance

• core autoformat.sh in heraldstack-infra handles node (prettier), python (black/ruff), go (gofmt)
• all collectives wire PostToolUse hook
• 30s timeout prevents formatter hangs from blocking conversation