Replace remaining hardcoded MOSAIC_HOME/tools paths (mosaic-init,
mosaic-ensure-sequential-thinking) and toolScript() with a shared
resolveTool() that checks the npm package first. Every script the
CLI delegates to now picks up the bundled version immediately after
npm upgrade — no mosaic init needed.
Bump @mosaic/mosaic and @mosaic/cli to 0.0.8.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>