Package "passport-azure-ad" is no longer supported

This example uses `passport-azure-ad` for authentication.
https://github.com/Azure-Samples/active-directory-b2c-javascript-nodejs-webapi/blob/49d6f813928a4c2ed41295c8dc043f8aac8f727b/package.json#L19

This package is no longer maintained, and not recommended to use. Ref: [GitHub Repo](https://github.com/AzureAD/passport-azure-ad)

Please kindly update the example without the use of this package.

Start with package.json at the referenced dependency line, then search the example for all uses of passport-azure-ad and its authentication flow. Replace the unsupported dependency while preserving the example’s Azure AD B2C access-token behavior, and verify that the package is no longer required.

Written by the indexing model from the issue text.