Feat: added the feature menu vertical navbar

[ankushtripathii]

This PR Added the new vertical navbar that includes (launches, missions, updates, and careers)

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[github-actions]

Great job, @ankushtripathii! 🎉 Thank you for submitting your first pull request. Your contribution is valuable and I appreciate your efforts to improve my project.

I will promptly review your changes and offer feedback. Keep up the excellent work! Kindly remember to check my contributing guidelines

[dakshsinghrathore]

@ankushtripathii looks great, but a small change is required i.e CENTER THE UNDERLINE

[ankushtripathii]

I think that its a bug because I have not added the underline property this I coded {text-decoration: none}

[dakshsinghrathore]

Thanks for contributing @ankushtripathii , stick around as i have some special gifts from my side for the top 3 contributors on my repo, kindly star the repo and a follow on github will be much appreciated !!🙌🏽

[dakshsinghrathore]

lgtm !