update overview and usage of project in README

[mandeep-s1ngh]

Hi, I am participating in Hacktoberfest this year (my first time) and your repo had the topic and a lot of stars so I wanted to contribute a non-code contribution and updated the README slightly. hope this is OK. thanks

[welcome[bot]]

Hello there!👋 Welcome to the project!💖 Thank you and congrats🎉 for opening your first pull request✨ 🙌.We will get back to you as soon as we can.😄

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