feat: changed website logo and fixed minor bug

[trinetra110]

📋 Description

Changed the website logo on various pages, added it to the home page and added the home page link in some of them. Also fixed a minor bug for accessing the faculty login page.

🔨 Changes Made

• Added the logos in PNG format: logo1, logo2 and logo3
• Changed them with the old logo.png and added the home page link in some of them.
• Fixed a minor bug of token checking in "fac_login.html"

✅ Checklist

Before submitting the PR, please make sure you have completed the following:

• I have followed all the guidelines mentioned in CONTRIBUTING.md.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation (if applicable).
• I have tested it locally and it works fine.
• Any dependent changes have been merged and published in downstream modules.

🏷️ Types of Changes

What type of changes does your code introduce? (Check all that apply)

• Bug fix (non-breaking change which fixes an issue) 🐛

• New feature (non-breaking change which adds functionality) ✨

• UI enhancement (non-breaking change which enhances UI) 🎨

• Documentation update 📚

• Fixes Feat: Changing Website Logo  #421

📸 Screenshots (if applicable)

Can't take so many SS, so uploading 1.

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Thank you for contributing to Research Nexus! We look forward to reviewing your PR and getting it merged!

[trinetra110]

@Harshdev098 I have made the required changes. Please review it and add the 'gssoc-ext' and 'level2' tags.

[Harshdev098]

Also change the favicon on every page

[trinetra110]

Also change the favicon on every page

@Harshdev098 done; please check.

[github-actions]

🎉🎉 Thank you for your contribution! Your PR #425 has been merged! 🎉🎉