Added 'Discord' link to navbar

[yashsaraswat2004]

Closes #354

This PR introduces a new section in the navbar dedicated to Discord, allowing users quick access to the official Discord server. The section is designed to be easily accessible, featuring a Discord icon that links directly to the server invite. The design is mobile-friendly and ensures proper alignment with the rest of the navbar elements.

Changes

• Added a new "Discord" section in the navbar.
• Integrated a clickable icon linking to the official Discord invite.
• Styled the section for mobile and desktop responsiveness.

Flags

• Ensure the new section does not disrupt the current navbar layout.
• Check for accessibility and ensure the section works with screen readers and keyboard navigation.

Screenshots or Video

Related Issues

• Issue feat(navbar): Add Discord link to navbar for easier community access #354

Author Checklist

• Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• Vital features and changes captured in unit and/or integration tests
• Commits messages follow AP format
• Extend the documentation, if necessary
• Merging to main from fork:branchname

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