Fix/update readme for latest backend folder structure

[AnandAyush005]

📝 Pull Request Description

Related Issue

Closes #382

Summary

Updated the README.md to reflect the latest backend project structure. Added the newly introduced input_validations directory and its associated files so that the documented folder hierarchy matches the current codebase. This keeps the project documentation accurate and improves onboarding for new contributors.

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Type of Change

• 📝 Documentation update

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How Has This Been Tested?

Describe the testing steps performed.

• The folder structure in README.md matches the current backend directory structure.
• All newly added backend directories, including input_validations, are correctly documented.

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Screenshots (if applicable)

Add screenshots or videos to demonstrate the changes.

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Checklist

• My code follows the project's guidelines
• I have tested my changes
• I have updated documentation where necessary
• I have linked the related issue
• My changes do not introduce new warnings or errors

[AnandAyush005]

ECSoC26

[KaranUnique]

@AnandAyush005 This issue is scoped only for updating the README/documentation. I noticed that this PR also includes changes to frontend/src/LandingPage.jsx, which appear to be unrelated to the documentation update. Could you please clarify why these changes were included?

[AnandAyush005]

@AnandAyush005 This issue is scoped only for updating the README/documentation. I noticed that this PR also includes changes to frontend/src/LandingPage.jsx, which appear to be unrelated to the documentation update. Could you please clarify why these changes were included?

Actually two issues were assigned to me, one was fixing the signup modal and other to update the README.md , but somehow commits of another issues comes in this also,

so you can remove the logic of frontend/src/Layout page, while merging the PR, and another PR to update the Layout page is already raised, so you can check from there