Use NuGet Trusted Publishing

[shibayan]

No description provided.

[Copilot]

Pull Request Overview

This PR migrates the NuGet publishing workflow from using a static API key stored in GitHub secrets to NuGet Trusted Publishing using OpenID Connect (OIDC) authentication. This approach eliminates the need to store long-lived API keys and provides more secure authentication.

• Adds OIDC permissions to enable trusted publishing authentication
• Integrates NuGet/login action to obtain temporary API keys via OIDC
• Updates the publish command to use the dynamically generated API key

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