[client] Add IPv6 dual-stack UI support

[lixmal]

Describe your changes

Add IPv6 support to the iOS and tvOS client UI, complementing the Go-side changes in netbirdio/netbird#5738.

• Display IPv6 address in peer cards and peer detail sheets
• Add "Disable IPv6" toggle to iOS advanced settings and tvOS settings
• Configure NEIPv6Settings on the tunnel interface when an IPv6 address is assigned
• Handle IPv6 address change notifications from the Go SDK
• Persist disable-IPv6 preference via ConfigurationProvider (App Group on iOS, JSON config on tvOS)

Checklist

• I have performed a self-review of my own code
• Is a feature enhancement

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 3e6eeaf5-9e40-4602-9014-17f81ea59b0a

📥 Commits

Reviewing files that changed from the base of the PR and between 2f29085 and 4087f1d.

📒 Files selected for processing (12)

• NetBird/Source/App/ViewModels/MainViewModel.swift
• NetBird/Source/App/Views/AdvancedView.swift
• NetBird/Source/App/Views/Components/PeerCard.swift
• NetBird/Source/App/Views/Components/PeerDetailSheet.swift
• NetBird/Source/App/Views/TV/TVSettingsView.swift
• NetBirdTVNetworkExtension/PacketTunnelProvider.swift
• NetbirdKit/ConfigurationProvider.swift
• NetbirdKit/NetworkChangeListener.swift
• NetbirdKit/StatusDetails.swift
• NetbirdNetworkExtension/PacketTunnelProvider.swift
• NetbirdNetworkExtension/PacketTunnelProviderSettingsManager.swift
• netbird-core

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/ipv6-support

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[github-actions]

TestFlight build failed for ac703e2

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[github-actions]

TestFlight build failed for 8fbeabc

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[lixmal]

@coderabbitai review

[coderabbitai]

✅ Actions performed

Review triggered.

Note: CodeRabbit is an incremental review system and does not re-review already reviewed commits. This command is applicable only when automatic reviews are paused.

[github-actions]

TestFlight build failed for 8fbeabc

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[github-actions]

Build failed (iOS, tvOS) for 192ea6d

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[github-actions]

Build failed (iOS, tvOS) for 3421c8b

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[lixmal]

/testflight version=0.1.6

[github-actions]

Build failed (tvOS) for 7e15c12

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[lixmal]

/testflight version=0.1.6