feat(utils): add jaccard similarity

src/lib/utils/jaccardSim.ts

@@ -0,0 +1,16 @@
+const computeJaccardSimilarity = (a: string, b: string): number => {
+  const wordsA = a.toLowerCase().split(/\W+/);
+  const wordsB = b.toLowerCase().split(/\W+/);
+
+  const setA = new Set(wordsA);
+  const setB = new Set(wordsB);
+
+  if (setA.size === 0 || setB.size === 0) return 0;
+
+  const union = setA.union(setB);
+  const intersections = setA.intersection(setB);
+
+  return intersections.size / union.size;
+};
+
+export default computeJaccardSimilarity;