[admin] Repurpose guides to dev communities and social

[anurag629]

Context

Part of the SEO growth initiative (#18): Phase 3: Authority and off-page.
Repurposing content to communities drives referral traffic and brand exposure, which feeds our (currently weak) branded search over time.

What to do

• Cross-post guides to dev.to and LinkedIn.
• Share tools/guides where relevant and allowed (Reddit, Hacker News Show HN) without spamming.
• Link back to the canonical pages.

Where

External platforms; canonical content stays on the site.

Acceptance criteria

• Guides cross-posted with canonical links
• Community shares done where appropriate

Notes

Branch off develop (feat/*, docs/*, chore/*), open a PR into develop, and squash-merge. See CONTRIBUTING.md.
cc @anurag629 (needs repo admin or an external account).