feat(biometric): add macOS Touch ID support via LocalAuthentication framework

[takahashim]

Add macOS Touch ID support to the biometric plugin via the LocalAuthentication framework using objc2 bindings.
Non-macOS desktop platforms should compile successfully and return "not available" gracefully.

Related issue: #1880

Implementation Details

• macOS implementation uses objc2-local-authentication crate.
  It includes status() (Touch ID availability check) and authenticate() (Touch ID prompt with device credential fallback).
• mobile.rs is extracted from the original mobile-only lib.rs.
  The core logic (plugin registration, run_mobile_plugin calls) is preserved, but JS invocations now route through commands.rs instead of being forwarded directly to the native plugin. This required adding max_attemps to the Rust　AuthOptions struct so the value passes through the Rust layer to Android/iOS.
• Behavior in macOS is aligned with the existing iOS plugin: pre-check via canEvaluatePolicy, localized fallback/cancel titles, touchIDAuthenticationAllowableReuseDuration = 0, and LAError code mapping.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	cargo/​objc2-local-authentication@​0.3.0

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