Add Wikipedia References

Add Wikipedia links to concepts missing them.

Find Concepts Without Wikipedia

# List concepts without Wikipedia
grep -L '"url": "https://en.wikipedia.org' src/data/concepts/*.json | xargs -n1 basename | sed 's/.json$//'

# Count
grep -L '"url": "https://en.wikipedia.org' src/data/concepts/*.json | wc -l

# First 20 for batch processing
grep -L '"url": "https://en.wikipedia.org' src/data/concepts/*.json | head -20 | xargs -n1 basename | sed 's/.json$//'

Workflow Per Concept