Flatten A Nested Object

Flatten a nested object that contains arrays and objects as children. The task is to make the object flat, i.e. there should be no nested children left and everything should be on a single level.

Example

const response = {
  name: 'Manu',
  age: 21,
  characteristics: {
    height: '6 feet',
  },
  techStack: {
    language: 'Javascript',
    framework: {
      name: 'Nextjs',
      version: '12',
    },
  },
};

After Flattening

response = {
    age: 21,
    characteristics.height: "6 feet",
    name: "Manu",
    techStack.framework.name: "Nextjs",
    techStack.framework.version: "12",
    techStack.language: "Javascript"
}