[FEATURE] Add a Testimonial Section to Enhance Website Credibility and Visual Appeal

### Is your feature request related to a problem? Please describe.

Currently, the website lacks a testimonial or user feedback section, which makes it feel incomplete and less trustworthy for new visitors. Testimonials are an essential part of building credibility and showcasing real user experiences — their absence slightly weakens the overall user impression.

### Describe the solution you'd like

I would like to add a Testimonial Section to the homepage (or an appropriate section of the site) that includes:

💬 Short quotes or feedback from satisfied users or contributors.

👤 User names, roles, and optional profile images for authenticity.

🎨 A clean, responsive design that fits with the existing ZettaNote UI theme.

🧭 Optional carousel/slider layout to cycle through multiple testimonials.

### Describe alternatives you've considered

Adding testimonials as part of the "About" section (but this could make that page too content-heavy).

Using a separate "Community" page, though it would require additional navigation effort from the user.
The homepage or landing area seems to be the most effective and visually appealing place for testimonials.

### Additional context

Adding this feature will:

✅ Improve first impressions and trustworthiness.

✨ Make the website feel more professional and complete.

💬 Provide social proof of ZettaNote’s value and impact.

if approved , to be considered for hacktoberfest.

Start by inspecting the homepage or landing area and the existing ZettaNote UI theme to find the appropriate insertion point and responsive design patterns. Done means a testimonial section with short feedback, names and roles, optional profile images, and a layout that fits the site; a carousel is optional as stated in the issue.

Written by the indexing model from the issue text.