This PR adds following :

• A fully automated deployment script that creates resources in azure, builds and deploys frontend application to Azure web app, sets the correct environment variables as app settings on web app.
• This also adds azure Active Directory authentication to the frontend web app using federated identity credentials.
• Post deployment the redirect URL of the deployed web app is added to app registration.
• It also includes a function that enables outbound vent integration on the web app resource to enable communication graph rag backend deployed with peered vnets. (After the simplify networking PR is merged, this will not be default behavior, so that function is commented.)
• ReadMe.md file has been updated to reflect steps for creating app registration and pre deployment configuration details.