Add BackToTopButton component, Issue #106

[PRANIT0605]

Pull Request for Stock Analyzer

Thank you for contributing to the Stock Analyzer open-source project!

Issue Title

**Added the BackToTopButton, Issue #106 **
Issue #106 has been resolved.

Contributor Details

• Name: Pranit Gore
• GitHub ID: PRANIT0605
• LinkedIn Username (for appreciation): Pranit Gore
• LinkedIn Profile URL (for verification): www.linkedin.com/in/pranit-gore-90097a274
• Email ID (for communication): pranitgore05@gmail.com
• Participation Program (if any): OSCI

Closes

Mention the issue number that your PR fixes.
Closes #106

Describe Your Changes

What have you added or modified in this pull request?
-Implemented a Back to Top button on the page.
-The button appears when the user scrolls down.
-Smoothly scrolls the page back to the top when clicked.
-Added styles for proper positioning and visibility.

Screenshots

what are the files you have changed

changed app.js
added BackToTopButton.jsx , BackToTopButton.css in src\components

How Has This Been Tested?

Describe your testing process.

-Verified locally that the button works as expected using npm.start .
-No breaking changes introduced.

Type of Change

Select all that apply:

• Bug fix (fixes an existing issue)
• New feature (adds new functionality)
• Code style update (formatting, refactoring)
• Breaking change (may affect existing features)
• Documentation update

Checklist

• My code follows the project’s guidelines and best practices.
• I have performed a self-review of my code.
• I have added meaningful comments where necessary.
• I have updated documentation wherever applicable.
• My changes do not generate any new warnings or errors.
• I have included screenshots, graphs, or test logs (if applicable).
• Any dependent changes have been merged and documented.

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[PRANIT0605]

Implemented BackToTop button with styling such that the button dynamically changes based on factors like page size and scroll speed.