feat(ui): add necessary utils

ui/lib/utils/computeSimilarity.ts

@@ -0,0 +1,17 @@
+import dot from 'compute-dot';
+import cosineSimilarity from 'compute-cosine-similarity';
+import { getSimilarityMeasure } from '../config';
+
+const computeSimilarity = (x: number[], y: number[]): number => {
+  const similarityMeasure = getSimilarityMeasure();
+
+  if (similarityMeasure === 'cosine') {
+    return cosineSimilarity(x, y) as number;
+  } else if (similarityMeasure === 'dot') {
+    return dot(x, y);
+  }
+
+  throw new Error('Invalid similarity measure');
+};
+
+export default computeSimilarity;