Add auth-client library for Elixir auth service integration

- Complete Angular client library for authentication and authorization
- JWT token management with automatic refresh and storage
- OAuth integration with social providers (Google, GitHub, etc.)
- Two-factor authentication support (TOTP and backup codes)
- Route guards for authentication and scope-based authorization
- HTTP interceptor for automatic token injection and refresh
- Comprehensive TypeScript interfaces for all API models
- User management features (profile updates, password changes)
- Cross-tab synchronization and token validation
- Complete usage guide with practical examples

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

projects/auth-client/tsconfig.lib.json

@@ -0,0 +1,18 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../out-tsc/lib",
+    "declaration": true,
+    "declarationMap": true,
+    "inlineSources": true,
+    "types": []
+  },
+  "include": [
+    "src/**/*.ts"
+  ],
+  "exclude": [
+    "**/*.spec.ts"
+  ]
+}