Export AzureAppConfigurationOptions

[linglingye001]

export AzureAppConfigurationOptions and the related option types to improve the developer experience.

import { load, AzureAppConfigurationOptions } from "@azure/app-configuration-provider";

const options: AzureAppConfigurationOptions = {
    selectors: [{ keyFilter: "app.*" }],
    trimKeyPrefixes: ["app."]
};

const settings = await load(connectionString, options);