Convert java to typescript

first.put("first.name", "Alan");
       first.put("last.name", "Jones");
       first.put("owner", true);
       first.put("years.old", 30);
       **JSONArray cars = new JSONArray();**
       cars.add(0, "VW");
       cars.add(1, "GM");
       cars.add(2, "Lexus");
       cars.add(3, true);
       cars.add(4, 42);
       cars.add(5, 2.71);

       first.put("cars", cars);
       finalJson.add(first);

Convert javascript to typescript

1. Add tsconfig.json file to project
2. Integrate with a build tool
3. Change all .js files to .ts files
4. Check for any errors

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