feat: integrate smooth scrolling effect using lenis

[lourduradjou]

This PR adds smooth scroll behavior to the site using Lenis.

Closes #83

Changes:

• Initialized Lenis in useEffect using requestAnimationFrame.
• Included cleanup-safe scroll loop.
• Applied official Lenis CSS (as recommended in docs):

Result:
The entire page now scrolls with a smooth, polished effect, improving UX without introducing scroll lag or layout shifts.

You can refer these videos below to get the visual appearance.

Without Lenis (current site):

responsible_site_without_lenis.mp4

With Lenis:

responsible_site_with_lenis.mp4

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
responsively-app-website	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 18, 2025 0:34am

[CLAassistant]

All committers have signed the CLA.

[manojVivek]

Hey, thank you for this contribution!
Just a couple of minor things.

[manojVivek]

Is it possible to check if this smooth scrolling can be applied when the navbar links are clicked? Like the "Features", "Testimonials" links?

[lourduradjou]

ok i'll add this and let you know @manojVivek

[lourduradjou]

Hi @manojVivek , i have all the changes you asked , now the site is smooth when it scrolls, not only in the root page, also in sponders, blogs .
And navlinks also made smooth when it is clicked, you can see the changes for 'features', 'testimonials'
I found some jsx errors in the footer file, i changed that also.

I am interested to contribute more if you need anything else @manojVivek , this repo doesn't have a docs shall i create a simple explanation and also how to run the repo for beginners.

i found some bugs in the actual responsibly app, shall i make a pr there too?