[Native Auth] Enable MFA and JIT for SMS in public interfaces

[shenj]

No description provided.

[Copilot]

Pull Request Overview

This PR enables Multi-Factor Authentication (MFA) and Just-in-Time (JIT) registration for SMS channels in the public interfaces of the MSAL browser custom authentication library. The changes integrate MFA client support throughout authentication flows and provide comprehensive test coverage for both MFA and JIT scenarios across sign-up, sign-in, and password reset flows.

• Adds MfaClient dependency injection to all authentication state parameters and controllers
• Updates result types to support MFA-required states alongside existing JIT support
• Extends integration tests to cover MFA and JIT flows with both email and SMS channels

Reviewed Changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Test files (*.spec.ts)	Add MfaClient mock setup and comprehensive test coverage for MFA/JIT scenarios
State parameter files	Add mfaClient property to enable MFA support across all authentication flows
State implementation files	Integrate MfaClient into state transitions and result handling
Result type files	Add MFA-required state support and type checking methods
Controller and client files	Wire up MfaClient dependency injection and MFA flow handling
Index file	Export MFA-related types and classes for public API