Made for Primo Internship skill test

The "merge" function is implemented as shown in main.ts It is tested with tests/main.test.ts using a function to call merge() recursively (similar to merge sort algorithm) to sort a shuffled array of integer from 1 to len . The resulted array was ensured by checking similarity to the template array.

1. run cli in the following sequence

   npm init -y
   npm install typescript
   npm install --save-dev @types/core-js @types/jest jest ts-jest
   

2. add tsconfig.json

1. add the following script to package.json

   "scripts": {
       "dev": "tsc main.ts && node main.js",
       "test": "jest"
   },
   

2. run npm run dev to execute main.ts, and run npm test to test the function with jest