Refactor of authentication code. Added configuration file selectable authentication method. Selectable from built-in Azure Identity, and custom PCA using MSAL.

src/cli/commands/login.ts

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 
 import { login } from "../../azure/index.ts";
-import { loadConfig } from "../../index.ts";
+import { loadAuthConfig } from "../../index.ts";
 
 import type { CommandValues } from "./types.ts";
 
@@ -17,7 +17,7 @@ Options:
 }
 
 export async function runLoginCommand(values: CommandValues): Promise<unknown> {
-  const config = await loadConfig("public-config");
+  const config = await loadAuthConfig("public-config");
   return login(
     config.tenantId,
     config.clientId,