🧪 Test analyzeLinks with no links

[saurabhsharma2u]

🎯 What: Added a unit test for analyzeLinks in plugins/core/tests/analysis.unit.test.ts.
📊 Coverage: The test covers the scenario where the input HTML contains no anchor tags.
✨ Result: Verified that internalLinks, externalLinks, nofollowCount are 0, and externalRatio is 0, ensuring correct handling of division by zero.

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PR created automatically by Jules for task 16839551563453047620 started by @saurabhsharma2u

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