Update Search/LinearSearch.js

test: added for Linear Search Algorithm

feat: added tests for Decimal Isolate function

removed unnecessary node:test import

fixed wrong import

feat: tests added for decimalIsolate and improved comments for clarity

fixed spelling mistake

fix: optimized AverageMean.js by removing redundant comments and unne…

feat: added SubsetSum and its test cases in Recursive Algos

Update Maths/AverageMean.js

fix: optimized AverageMean.js by removing redundant comments and unne…

docs: fixed misleading comment about the array method (forEach instea…