docs(wiki): refresh trending repository signals

[devswha]

Summary

• Refresh the trending repositories operating note to the 2026-07-12 GitHub Search snapshot.
• Update tracked repository stats in repoStats.generated.ts via the build-time collector.
• Keep this as a maintenance PR; merge is left to devswha.

Evidence / sources checked

• Synced main from origin/main before editing.
• Inspected covered wiki article repositories under src/wiki/*Article.ts.
• Fetched GitHub metadata for 40 covered repositories with gh api repos/{owner}/{repo}.
• Queried GitHub Search API for:
  • topic:ai-agent stars:>1000 pushed:>2026-07-01
  • topic:developer-tools stars:>5000 pushed:>2026-07-01
  • agentic coding stars:>500 pushed:>2026-07-01
  • topic:documentation stars:>1000 pushed:>2026-07-01
  • topic:code-generation stars:>1000 pushed:>2026-07-01

Test results

• npm test -- --run — passed, 77 tests
• npm run typecheck — passed
• npm run build — passed; repo stats collector fetched 40 repos, kept 0 on error, skipped 3 non-repo sample slugs

Merge note

• Do not auto-merge; merge is left to devswha.