[fix]: Update README.md

[YASH-YADAV-dynamo]

Added commands in README.md for steps to set the environment for contribution

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Description 📜

Fixed README.md with steps for user to just copy-paste in terminal to setup the environment.
Fixes <#45>

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Domain of Contribution 📊

• Documentation
• Android (Kotlin)

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Checklist ✅

• I follow Code of Conduct of this project.
• I have performed a self-review of my own code or work.
• I have put headings in my code, particularly in hard-to-understand areas.
• My changes generates no new warnings.

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[vigneshshettyin]

This is not enough. create a separate file with complete guide to setup project locally as well @YASH-YADAV-dynamo

[YASH-YADAV-dynamo]

Ok,sure will update it.

[YASH-YADAV-dynamo]

Created a separate file as "contribution.md" for steps to contribute and for setting up the project locally mentioned to install android studio

[YASH-YADAV-dynamo]

If any more changes are needed ,please mention them in detail..i will surely work on them