Allow to configure Non-Public clouds to generate app tokens

[rido-min]

teams.ts/packages/apps/src/token-manager.ts

Line 11 in 4fdb54b

const GET_DEFAULT_TOKEN_AUTHORITY = (tenantId: string) => `https://login.microsoftonline.com/${tenantId}`;

Add a configuration setting to allow overriding the authority URL, following this doc https://learn.microsoft.com/en-us/entra/identity-platform/msal-national-cloud?tabs=javascript