Fix: stop fetching docs at Cloudflare build time

[initializ-mk]

Summary

The deployed site was missing skills on /hub (only 4 fallback skills shown instead of 14) and the GitHub star count in the nav was —.

Root cause: Cloudflare Pages builds run on shared IPs without GITHUB_TOKEN. The newly-added sync:docs step makes 2 extra api.github.com calls before fetch:skills and fetch:contributors. That's enough to push past the 60/hour unauthenticated quota, after which both scripts silently fall back to empty/default data.

Fix:

• Remove sync:docs from the build chain — the GitHub Actions workflow (sync-docs.yaml) already handles syncing docs on forge repo updates.
• Un-gitignore the synced docs paths so the workflow's commits actually land in the repo and Cloudflare ships them as static content.
• Commit the currently-synced docs as the baseline.

Test plan

• After merge, Cloudflare rebuild completes and /hub shows all 14 skills
• Nav shows actual star count, not —
• Docs pages still render (now from committed files instead of build-time fetch)
• Future doc updates trigger the sync-docs GitHub Actions workflow which commits and triggers a Cloudflare rebuild