restructure

[kaustav202]

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• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Restructure the base directory

• What is the current behavior? (You can also link to an open issue here)

All files flat at the root

• What is the new behavior (if this is a feature change)?

Convenient categorization of the project files and more structure

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

• Other information:

Explain the motivation for making this change. What existing problem does the pull request solve?

meaningful project structure

Test plan

Demonstrate the code is solid. Example: The exact commands you ran and their output, screenshots / videos if the pull request changes UI.

Code formatting

Closing issues

Fixes #5