feat: add :app-tv module as Android TV starting point

Creates a new :app-tv application module that reuses shared business
logic from :core:model, :core:data, :core:player, and :feature:shared,
with its own TV-specific UI layer.

- TvApplication + TvActivity with full Hilt + Navigation3 wiring
- TvHomePage reusing HomePageViewModel from :feature:shared
- Copied common UI components (PosterCard, WaitingScreen, etc.)
- Copied login screen and form components
- TV navigation module with Home + Login route entry builders
- Material3 theme copied from mobile (ready for TV customization)
- AndroidManifest with LAUNCHER + LEANBACK_LAUNCHER intent filters
- Excludes :feature:download (downloads are mobile-only)

app-tv/src/main/AndroidManifest.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <uses-feature
+        android:name="android.hardware.touchscreen"
+        android:required="false" />
+    <uses-feature
+        android:name="android.software.leanback"
+        android:required="false" />
+
+    <application
+        android:name=".TvApplication"
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/purefin_logo"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/purefin_logo_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Purefin">
+        <activity
+            android:name=".TvActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Purefin">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>