Support NuxtJS SDK for Sign-In/Sign-Out with AsgardeoV2 Platform

### Problem

The asgardeo nuxtjs SDK does not currently support sign-in and sign-out functionalities for the AsgardeoV2 platform. This limitation prevents seamless integration for applications built with NuxtJS that intend to leverage authentication via AsgardeoV2.

### Proposed Solution

Introduce sign-in and sign-out functionalities to the asgardeo nuxtjs SDK with full support for AsgardeoV2. This may involve updating existing logic, documenting usage, and ensuring compatibility with the latest AsgardeoV2 platform changes.

### Alternatives

_No response_

### Please select the package issue is related to

@asgardeo/nuxt

### Version

N/A

### Reporter Checklist

- [x] I have searched the existing issues and this is not a duplicate.
- [x] I have provided all the necessary information.
- [x] I have verified the feature on the latest version of the package.