adding graph traversals

[Riyachauhan11]

Pull Request for PyVerse 💡

Requesting to submit a pull request to the PyVerse repository.

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Issue Title

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adding graph traversals

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Info about the Related Issue

What's the goal of the project?
adding menu driven code for DFS and BFS in graphs section.

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Name

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Riya Chauhan

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GitHub ID

Riyachauhan11

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Email ID

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riyacn112@gmail.com

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Identify Yourself

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GSSOC

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Closes

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*Closes: #1063

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Describe the Add-ons or Changes You've Made

Give a clear description of what you have added or modified.
Describe your changes here.
I have added code of menu driven DFS and BFS algo for Graphs in data structures section.

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Type of Change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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How Has This Been Tested?

Describe how your changes have been tested.
locally tested on online compiler

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Checklist

Please confirm the following:

• My code follows the guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added things that prove my fix is effective or that my feature works.
• Any dependent changes have been merged and published in downstream modules.

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