update skill to say dont make up Tabler icons - #2703

Incremental Code Review Summary

The latest PR head still contains the corrected Tabler declaration path, node_modules/@tabler/icons-react/dist/tabler-icons-react.d.ts, with no regression of the prior dist/esm/ issue. Independent reviewers verified that the path is valid for the repository's current Tabler package versions and that the example names are not exported. The guidance accurately explains the Vite failure mode and provides a practical verification step before importing unfamiliar icons.

No new or unresolved actionable issues were found. This remains a low-risk, documentation-only change with no runtime or user-facing browser impact. 🧪 Browser testing: Skipped — PR only modifies backend/config/docs, no UI impact.