Extract standalone woolpack author tools

[minglong51]

Summary

• extract pack validation and SVG sanitization into an independently buildable packages/woolpack distribution
• ship woolpack new, woolpack render, and woolpack lint with bundled Pebble/CSS resources and MIT license metadata
• keep Woolroom runtime registration and legacy import/script surfaces as compatibility adapters
• wire the uv workspace, Docker install, CI wheel smoke, and HLD/LLD ownership boundary

Stack dependency

Depends on #29. This branch is stacked on fdd11ed, so the PR includes that guest-readonly commit until #29 lands. The Woolpack commit itself is 34d55adc7fe4fc6621cdbe23345ab8fafd0d045a.

Verification

• uv sync --extra dev --locked
• uv run pytest tests -q — 242 passed, 1 skipped
• uv run ruff check .
• resource, license, app.*-import, and live/default-environment parity checks
• isolated wheel uvx: scaffold → render → strict lint — 13 PASS / 0 WARN / 0 ERROR
• immutable Git-SHA uvx with #subdirectory=packages/woolpack: scaffold → render → strict lint — 13 / 0 / 0
• generated render board inspected at 375, 768, and 1280 px with no overflow or console/network failures

PyPI publication, public install documentation, deployment, and production data changes remain out of scope.