feat:Add JWT-based authentication middleware to protect APIs

[LONECODER1]

Description

This pull request adds a JWT authentication middleware to secure protected routes and restrict access based on user roles.
The middleware verifies access tokens and checks whether the user’s role (e.g., admin, user, moderator) matches the required role for a given route.

Key Changes

• Implemented JWT verification using access and refresh tokens.
• Added role-based access control (RBAC) logic.
• Updated protected routes to use the new middleware.
• Improved error responses for unauthorized and invalid token requests.

Semver Changes

• Minor (new features, no breaking changes)

Issues

Closes #20

Checklist

• I have read the Contributing Guidelines.
• Middleware properly restricts routes based on roles.
• Tokens are validated using environment secrets.
• All tests and lint checks pass.

[04shubham7]

Pls resolve merge conflicts first and pls try to do it carefully as whole project depends upon packages

[04shubham7]

NICE