Add "Watchlist" Feature

[gaurivvv]

Ever found a great movie while browsing but didn’t have time to watch it right away? 🎥 That’s where a Watchlist comes in! This feature will let users save movies they’re interested in and revisit them later.

Why It Matters?
Makes CineVerse feel more personal.
Encourages users to keep coming back to check their saved movies.
A familiar feature from popular streaming apps (Netflix, IMDb).

What Needs to Be Done?
Add a "➕ Add to Watchlist" button on movie cards and movie details.
Store the watchlist in local storage (for now).
Create a /watchlist page to display saved movies.

Expected Outcome
Users can mark movies and easily view them later in their own dedicated watchlist page.

Difficulty Level: 🟢 Beginner-friendly

[github-actions]

Thank you for raising this issue!

We'll review it as soon as possible. We truly appreciate your contributions! ✨

Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊

[gaurivvv]

please assign me this isssue

[rahulkhandait-sde]

@gaurivvv this feature is already present. Please check our latest website.