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/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile