[PC TV] Add home_shown and sign_in_type_tapped analytics events

[kean]

Fixes PCIOS-793.

Wires up two new tvOS-only analytics events:

• home_shown — fired when the Home tab appears (HomeView .task).
• sign_in_type_tapped — fired when the user switches the sign-in picker between QR code and password (SignInView .onChange(of: loginType)), with a type property of qr or password.

Schema changes are in Automattic/EventHorizonSchemas#93.

To test

1. Run the Pocket Casts TV App target on the tvOS simulator.
2. Watch the console for AnalyticsLoggingAdapter output.
3. From the logged-out state, open Sign In and toggle the picker between QR Code and Password → each switch logs sign_in_type_tapped with type = qr / password.
4. Sign in and land on the Home tab → home_shown is logged when Home appears.

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the Event Horizon schema to reflect any new or changed analytics.

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[dangermattic]

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Generated by 🚫 Danger

[SergioEstevao]

New events being sent.

Remember to add them to Event Horizon :)